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Published bySudirman Indradjaja Modified over 5 years ago
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Polynomials A polynomial is a sum of monomials. Common polynomials:
A binomial is a sum of two monomials. A trinomial is a sum of three monomials.
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(the powers go from greatest to least)
Standard Form The terms of a polynomial are usually written so that the powers of the variable are in descending form. (the powers go from greatest to least) Ex. Write 7x2 – x4 in standard form. 2x4 + 7x2 – 11
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Rewrite each polynomial so that the powers of x are in descending form.
6x2 + 5 – 8x – 2x3 2) 2xy3 + y2 + 5x3 – 3x2y
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Adding & Subtracting Polynomials
To add or subtract polynomials, 1) Align The Like Terms 2) Add/Subtract The Like Terms *Subtracting is the same as adding the opposite!! ** When adding or subtracting, EXPONENTS STAY THE SAME!!
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1. Add the following polynomials (9y – 7x + 15a) + (-3y + 8x – 8a)
Line up your like terms. 9y – 7x + 15a + -3y + 8x – 8a _________________________ 6y + x + 7a
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2. Add the following polynomials (3a2 + 3ab – b2) + (4ab + 6b2)
_________________________ 3a2 + 7ab + 5b2
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3. Add the following polynomials (4x2 – 2xy + 3y2) + (-3x2 – xy + 2y2)
Line up your like terms. 4x2 – 2xy + 3y2 + -3x2 – xy + 2y2 _________________________ x2 - 3xy + 5y2
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4. Subtract the following polynomials (9y – 7x + 15a) – (-3y +8x – 8a)
Line up your like terms and add the opposite. 9y – 7x + 15a + (+ 3y – 8x + 8a) 12y – 15x + 23a
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5. Subtract the following polynomials (7a – 10b) – (3a + 4b)
4a – 14b
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6. Subtract the following polynomials (4x2 – 2xy + 3y2) – (-3x2 – xy + 2y2)
7x2 – xy + y2
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7. Subtract (2x2 – 5a2 + 7x) from (5x2 + 3a2 – 5x).
From Comes First!!!! 7. Subtract (2x2 – 5a2 + 7x) from (5x2 + 3a2 – 5x). (5x2 + 3a2 – 5x) – (2x2 – 5a2 + 7x) The polynomial after FROM goes first!!!! 5x2 + 3a2 – 5x + (- 2x2 + 5a2 – 7x) 3x2 + 8a2 – 12x
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8. Subtract (5x2 – 4) from (3x2 + 8x + 4).
(3x2 + 8x + 4) – (5x2 – 4) 3x2 + 8x + 4 + (- 5x ) -2x2 + 8x + 8
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Find the sum or difference. (5a – 3b) + (2a + 6b)
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Find the sum or difference. (5a – 3b) – (2a + 6b)
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