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1.1Index Notation 1.2Concepts of Polynomials 1Manipulations and Factorization of Polynomials 1.3Addition and Subtraction of Polynomials 1.4Multiplication of Polynomials 1.5Factorization by Taking Out Common Factors and Grouping Terms
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1.1Index Notation A.Introduction to Indices We can compare it with a = a 1, which is the 1st power of a. a 2 can be read as ‘a squared’. a 3 can be read as ‘a cubed’. a = a 1, which is the 1st power of a. a 2 can be read as ‘a squared’. a 3 can be read as ‘a cubed’.
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1.1Index Notation A.Introduction to Indices
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Solution: Represent each of the following expressions using index notation. (a)6 6 6 7 7 (b)h h k k k (a)6 6 6 7 7 (b) h h k k k Example 1T 1Manipulations and Factorization of Polynomials
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Solution: Use index notation to represent each of the following expressions. (a)( 5) ( d) ( 5) ( d) ( d) ( 5) d ( 5) (b)m ( m) n m ( n) ( m) ( m) (a) ( 5) ( d) ( 5) ( d) ( d) ( 5) d ( 5) (5 d 5 d d 5 d 5) (5 5 5 5 d d d d) (b) m ( m) n m ( n) ( m) ( m) m m n m n m m m m m m m n n Example 2T 1Manipulations and Factorization of Polynomials
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1.1Index Notation B.Addition of Indices The base of an expression remains unchanged during simplification, whether it is a variable or a number.
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Solution: Simplify each of the following expressions. (a)5d 2 2d 8 (b) (5p 5 )(3p) (c) u 2 4u 3 9u 4 (a) (c) (b)(b) Example 3T 1Manipulations and Factorization of Polynomials
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Solution: Simplify each of the following expressions. (a)( 6p 5 q 3 )(4p 2 )(b)(7h 2 k 4 )(8k 5 h 3 ) (b) (a) Example 4T 1Manipulations and Factorization of Polynomials
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1.1Index Notation C.Subtraction of Indices If a = 0, then a n = 0. In this case, a m a n is undefined because a m is divided by 0.
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Simplify the following expressions. (a)(b) Solution: (a) (b)(b) Example 5T 1Manipulations and Factorization of Polynomials
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Solution: Simplify 6t 6 18t 3 9t 4. Example 6T 1Manipulations and Factorization of Polynomials
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1.2Concepts of Polynomials A.Definition
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1.2Concepts of Polynomials A.Definition
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1.2Concepts of Polynomials B.Degree and Arrangement of Terms
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1.2Concepts of Polynomials B.Degree and Arrangement of Terms
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Determine the degree of each of the following polynomials. (a) 6a 3 5a 5 + 1(b) 5h 2 k 3 + 6l 8m 6 Solution: (a) ∵ Degrees of monomials 6a 3, 5a 5 and 1 are 3, 5 and 0 respectively. ∴ Degree of 6a 3 5a 5 1 (b) ∵ Degrees of monomials 5h 2 k 3, 6l and 8m 6 are 5, 1 and 6 respectively. ∴ Degree of 5h 2 k 3 + 6l 8m 6 Example 7T 1Manipulations and Factorization of Polynomials
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Arrange the terms of each of the following polynomials in descending powers of a. (a) 2b a 3 3ab(b)ab 2 c 5a 2 c b 4 (a) 2b a 3 3ab a 3 3ab 2b Solution: (b)ab 2 c 5a 2 c b 4 5a 2 c ab 2 c b 4 a 3 3ba 2b 5ca 2 b 2 ca b 4 Example 8T 1Manipulations and Factorization of Polynomials
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1.2Concepts of Polynomials C.Values of Polynomials
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Find the value of the polynomial 3x 5y x 2 y in each of the following cases. (a)x 1, y 5(b)x 4, y 3 Solution: Example 9T 1Manipulations and Factorization of Polynomials
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1.3Addition and Subtraction of Polynomials A.Like Terms and Unlike Terms The coefficients of the terms are not involved in classifying like terms.
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First remove the brackets, then combine the like terms. 1.3Addition and Subtraction of Polynomials B.Addition and Subtraction of Polynomials
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Simplify the following polynomials. (a)(7c 2d) ( 3c 2d)(b)(8y z) ( z y) Solution: (a) (b) Example 10T 1Manipulations and Factorization of Polynomials
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Simplify the following polynomials. (a)( 9r 3 6r 2 9r 8) (5 10r 3r 2 8r 3 ) (b)(2x 3 x 2 9x) ( 4x 4 7x 3 3x 2 ) Solution: (a) (b) Example 11T 1Manipulations and Factorization of Polynomials
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Simplify the following polynomials. (a)(3a 2 b 4ab 5a) (2a 2 b 7a 2 2ab 5) (b)(7r 2 4rs 5s) ( 8s 12 6r 2 ) Solution: Example 12T 1Manipulations and Factorization of Polynomials
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1.4Multiplication of Polynomials A.Multiplication of Polynomials
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1.4Multiplication of Polynomials A.Multiplication of Polynomials
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(b) (4r s)(6r) (4r)(6r) (s)(6r) Solution: (a) Expand the following polynomials. (a) 2( h 5k) (b) (4r s)(6r) (c) (2z 2 + z – 3)(8) (c)(c) Example 13T 1Manipulations and Factorization of Polynomials
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Expand the following polynomials. (a) (u 3)(4u 5) (b)( z 2)(z 3) Solution: Example 14T 1Manipulations and Factorization of Polynomials
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Expand the following polynomials. (a)(xy 1)(4xy 3)(b)(5ab 2)(2a b 4) Solution: Example 15T 1Manipulations and Factorization of Polynomials
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1.4Multiplication of Polynomials B.Mixed Operations of Polynomials
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Simplify 2y(y – 3) + 3(y 2 – 1). Solution: Example 16T 1Manipulations and Factorization of Polynomials
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Simplify [(x 3y)(2x 5y) 2]( x). Solution: Example 17T 1Manipulations and Factorization of Polynomials
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1.5Factorization by Taking Out Common Factors and Grouping Terms
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A.Taking Out Common Factors
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Factorize the following expressions. (a) 6xy + 9xz (b) 2y 2 + 3y 3 (c) 15m 2 n + 12n (d) – p – p 2 Solution: (a) 6xy 9xz 3x(2y) 3x(3z) (b)(b) (c)(c) (d)(d) Example 18T 1Manipulations and Factorization of Polynomials
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Factorize the following expressions. (a) 5a 2 x + 15a 2 x 2 (b) 45pq – 60pqr (c) 18x 3 y + 24x 2 y 2 30xy 3 Solution: (a) (b) (c) Example 19T 1Manipulations and Factorization of Polynomials
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Factorize the following expressions. (a) (2a – b)c + (2a – b)d(b) 2m(x – 2y) + 4n(2y – x) (c) –5rt – 2t(3r – 4s)(d) 18m 2 n(p – q) 2 – 27mn 2 (q – p) Solution: (a) (b) (c) (d) Example 20T 1Manipulations and Factorization of Polynomials
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1.5Factorization by Taking Out Common Factors and Grouping Terms B.Grouping Terms
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Factorize the following expressions. (a) 2ab + 6b + ac + 3c (b) 6h – 2hm + 3k – km Solution: Example 21T (a) 2ab 6b ac 3c (2ab 6b) (ac 3c) 2b(a 3) c(a 3) (b) 6h 2hm 3k km (6h 3k) (2hm km) 3(2h k) m(2h k) 1Manipulations and Factorization of Polynomials
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Factorize the following expressions. (a) 1 – y + 5xy – 5x (b) 6xyz – 6wyz – 5w + 5x Solution: Example 22T (a) (b)(b) 1Manipulations and Factorization of Polynomials
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Factorize the following expressions. (a) x 2 y 2 + y 2 + x 2 + 1 (b) 3az – 6bz – 12b + 6a Solution: Example 23T (a) (b)(b) 1Manipulations and Factorization of Polynomials
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Follow-up 1 Represent each of the following expressions using index notation. (a)3 3 3 4 4 4 (b)p p q q q q Solution: (a)3 3 3 4 4 4 (b)p p q q q q 1Manipulations and Factorization of Polynomials
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Follow-up 2 Use index notation to represent each of the following expressions. (a)(–7) (–7) (–a) (–7) (–a) a ( –7) (b)c (–d) c d (–d) (–c) (–c) d (–d) Solution: 7 7 a 7 a a 7 7 7 7 7 a a a (a) 1Manipulations and Factorization of Polynomials (b)(b) c ( d) c d ( d) ( c) ( c) d ( d) (c d c d d c c d d) (c c c c d d d d d)
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Follow-up 3 Simplify the following expressions. (a)4c 3 3c 4 (b)2n 5 5n 2 (c)( 2z)(4z 4 )(6z 7 ) Solution: (a) (b) 1Manipulations and Factorization of Polynomials (c)
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Follow-up 4 Solution: Simplify the following expressions. (a) 18u 7 v 4 9v 5 u(b) ( 4ab 2 )( 3a 3 b 6 ) (a) 18u 7 v 4 9v 5 u (b) ( 4ab 2 )( 3a 3 b 6 ) 1Manipulations and Factorization of Polynomials
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Follow-up 5 Simplify the following expressions. (a) (b)8y 8 y 4 2y 2 Solution: (a) (b) 1Manipulations and Factorization of Polynomials
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Follow-up 6 Solution: (a)(b) Simplify the following expressions. (a)(b) 4r 5 12r 3 3r 2 1Manipulations and Factorization of Polynomials
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Follow-up 7 Determine the degree of each of the following polynomials: Solution: Degrees of monomials of 5m and 6m 2 are 1 and 2 respectively. Degree of 3 5m + 6m 2 (a) (b) Degrees of monomials of 3p 3, 5p 2 q 2 and 8q 2 are 3, 4 and 2 respectively. Degree of 3p 3 5p 2 q 2 8q 2 1Manipulations and Factorization of Polynomials
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Follow-up 8 Solution: Arrange the terms of each of the following polynomials in descending powers of s. (a)r 6sr 5r 2 s 2 (b) 3 2ts 2 st 3 w (a)r 6sr 5r 2 s 2 5r 2 s 2 6sr r (b) 3 2ts 2 st 3 w 2ts 2 st 3 w 3 1Manipulations and Factorization of Polynomials
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Follow-up 9 Solution: Find the values of the following polynomials when h 1 and k 2. (a)9k hk 4k 2 h(b) 3 2h 3 6kh 2 k 1Manipulations and Factorization of Polynomials
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Follow-up 10 Solution: Simplify the following polynomials. (a)(5m 7n) ( 8n 5m)(b)( 4v 10u) (4u 9v) (a) (b) 1Manipulations and Factorization of Polynomials
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Follow-up 11 Solution: Simplify the following polynomials. (a)(5y 3 4 2y) (2y 2 4y 3 1 2y) (b)(3a 2 a 3) (3a a 2 3) 1Manipulations and Factorization of Polynomials
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Follow-up 12 Solution: Simplify the following polynomials. (a)(5yz 4y 2 z z 10) (2y 2 z 6 6z) (b)(4mn 2 5m 2 8) ( 2mn 2 3n 2 4) 1Manipulations and Factorization of Polynomials
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Follow-up 13 Expand the following polynomials. (a)4( a 4b)(b)(3m 4n) 2n (c) u( 2 + 4h k) (a)4( a 4b) 4( a) 4(4b) (b)(3m 4n) 2n (3m)(2n) (4n)(2n) Solution: (c)u( 2 4h k) u( 2) u(4h) uk 1Manipulations and Factorization of Polynomials
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Follow-up 14 Expand the following polynomials. (a)(2x 3)(x 4) (b)( 5y 1)(5y 1) Solution: 1Manipulations and Factorization of Polynomials
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Follow-up 15 Solution: Expand the following polynomials. (a)(4m n)(2n 3m)(b)(4y 1)(5y 2 5y 4) 1Manipulations and Factorization of Polynomials
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Follow-up 16 Solution: Simplify 6m – 5m(m – 4). 6m 5m(m 4) 6m 5m(m) 5m( 4) 6m 5m 2 20m 5m 2 6m 20m 1Manipulations and Factorization of Polynomials
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Follow-up 17 Solution: Simplify the following polynomials. (a)(3a 2 4ab) (2a b)(a 4b) (b)( 2 5k)[(4k 3h) (6h 2k)] 1Manipulations and Factorization of Polynomials
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Follow-up 17 Solution: Simplify the following polynomials. (a)(3a 2 4ab) (2a b)(a 4b) (b)( 2 5k)[(4k 3h) (6h 2k)]
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Follow-up 18 Solution: Factorize the following expressions. (a)4mn – 12mp (b) x 5 + 4x (c)9p 4 – 3p 2 (d) –2x – 4y (a) 4mn 12mp 4m(n) 4m(3p) (b) x 5 + 4x x(x 4 ) + x(4) (c)(c) (d)(d) 2x 4y 2(x) ( 2)(2y) 1Manipulations and Factorization of Polynomials
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Follow-up 19 Solution: Factorize the following expressions. (a)3a 2 x – 12ax 2 (b) 25a 2 c + 40abc 2 (c)14m 3 n – 28m 2 n 2 + 21m 2 n 3 1Manipulations and Factorization of Polynomials
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Follow-up 20 Solution: Factorize the following expressions. (a)(a – c)b + (a – c)d (b) 5m(p – q) – n(q – p) (c)(4x – 3y)z + 5yz 1Manipulations and Factorization of Polynomials
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Follow-up 21 Solution: Factorize the following expressions. (a)3xz – x + 6yz – 2y (b) 4mp – 4np + mq – nq (c)6ac – 4a – 9bc + 6b (a) 3xz x 6yz 2y (3xz 6yz) (x 2y) 3z(x 2y) (1)(x 2y) (b) 4mp 4np mq nq (4mp 4np) (mq nq) 4p(m n) q(m n) 1Manipulations and Factorization of Polynomials (c)6ac 4a 9bc 6b (6ac 9bc) (4a 6b) 3c(2a 3b) 2(2a 3b)
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Follow-up 22 1Manipulations and Factorization of Polynomials Solution: Factorize the following expressions. (a)6ac + 6ac + a + b (b) 4rst – 6rsu + 2t – 3u (a) 6ac 6bc a b (6ac 6bc) (a b) 6c(a b) (1)(a b) (b)(b)
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Follow-up 23 Solution: Factorize the following expressions. (a)2b + ab – a – 2b 2 (b) –2x 2 y + 6xz + 12xy – 36z (a)(a) (b)(b) 1Manipulations and Factorization of Polynomials
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