Polynomials By the end of class, you will be able to:

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Presentation transcript:

Polynomials By the end of class, you will be able to: 1. find the degree of a polynomial. 2. arrange the terms of a polynomial in ascending or descending order.

What does each prefix mean? mono one bi two tri three

What about poly? one or more A polynomial is a monomial or a sum/difference of monomials. Important Note!! An expression is not a polynomial if there is a variable in the denominator.

State whether each expression is a polynomial. If it is, identify it. 1) 7y - 3x + 4 trinomial 2) 10x3yz2 monomial 3) not a polynomial

Which polynomial is represented by X 1 X 1 X2 X x2 + x + 1 x2 + x + 2 x2 + 2x + 2 x2 + 3x + 2 I’ve got no idea!

The degree of a monomial is the sum of the exponents of the variables The degree of a monomial is the sum of the exponents of the variables. Find the degree of each monomial. 1) 5x2 2 4a4b3c 8 -3

Which is biggest? 2 is the degree! To find the degree of a polynomial, find the largest degree of the terms. 1) 8x2 - 2x + 7 Degrees: 2 1 0 Which is biggest? 2 is the degree! 2) y7 + 6y4 + 3x4m4 Degrees: 7 4 8 8 is the degree!

Find the degree of x5 – x3y2 + 4 2 3 5 10

A polynomial is normally put in ascending or descending order. What is ascending order? Going from small to big exponents. What is descending order? Going from big to small exponents.

Put in descending order: 8x - 3x2 + x4 - 4 x4 - 3x2 + 8x - 4 2) Put in descending order in terms of x: 12x2y3 - 6x3y2 + 3y - 2x -6x3y2 + 12x2y3 - 2x + 3y

3) Put in ascending order in terms of y: 12x2y3 - 6x3y2 + 3y - 2x -2x + 3y - 6x3y2 + 12x2y3 Put in ascending order: 5a3 - 3 + 2a - a2 -3 + 2a - a2 + 5a3

Write in ascending order in terms of y: x4 – x3y2 + 4xy – 2x2y3 – 2x2y3 – x3y2 + 4xy + x4 x4 – x3y2– 2x2y3 + 4xy 4xy – 2x2y3 – x3y2 + x4