Information about Math AB Chapter 8 Polynomials

Published on January 3, 2008

Author: mcarls

Source: slideshare.net

Trial on Polynomials.

What do we know about Polynomials? Degree - Binomial - Trinomial - When you multiply you ________ exponents. When you divide you _________ exponents.

When we want to multiply Binomials For example: (2x – 8)(3x + 1) F (2x)(3x) = 6x 2 O (2x)(+1) = 2x I (-8)(3x) = - 24x L (-8)(+1) = -8 You use the FOIL method! Answer: 6x 2 – 22x – 8

When we want to multiply Binomials

YOUR TURN! Try these: (x – 3)(2x + 4) (6y – 1)(2y + 5) 3. (5z – 10)(3z – 3)

YOUR TURN!

Try these:

(x – 3)(2x + 4)

(6y – 1)(2y + 5)

3. (5z – 10)(3z – 3)

What if you need to express the area of a rectangle whose dimensions are: (2x + 7) and (5x – 3)? (2x+7) (5x-3) Find the Area! So, A = bh A = (2x + 7)(5x-3) A = 10x 2 + 25x – 6x – 21 AREA is = 10x 2 + 19x - 21

What if you need to express the area of a rectangle whose dimensions are: (2x + 7) and (5x – 3)?

Allright…..that was a good review…… NOW, Let’s Practice…..

Allright…..that was a good review…… NOW,

Let’s Practice…..

1. Simplify: (y 3 – 7y + 10) + (3y 3 + y 2 – 3) 1. 4y 3 + y 2 – 7y + 7 3. 4y 6 + y 2 – 7y + 7 2. -2y 3 – y 2 – 7y + 13 4. 2y 3 + y 2 – 7y + 7

1. Simplify:

(y 3 – 7y + 10) + (3y 3 + y 2 – 3)

1. 4y 3 + y 2 – 7y + 7 3. 4y 6 + y 2 – 7y + 7

2. -2y 3 – y 2 – 7y + 13 4. 2y 3 + y 2 – 7y + 7

2. Evaluate: (6x 2 – 7x + 4) – (x 2 – 7x + 14) 1. 7x 2 – 14x + 18 3. 7x 2 – 10 2. 5x 2 – 10 4. 5x 2 – 14x - 10

2. Evaluate:

(6x 2 – 7x + 4) – (x 2 – 7x + 14)

1. 7x 2 – 14x + 18 3. 7x 2 – 10

2. 5x 2 – 10 4. 5x 2 – 14x - 10

3. Simplify : (4 y - 5)(3 y - 7) A.12 y 2 – 43 y + 35 C. 12 y 2 – 13 y + 35 B.12 y 2 + 35 D.12 y 2 – 43 y – 35

4. Write an expression for the area of the rectangle. A. x 2 - 20 C. x 2 – 20x - 1 B. x 2 – 9 x – 20 D. x 2 – x – 20 (x - 5) (x + 4)

4. Write an expression for the area of the rectangle.

A. x 2 - 20 C. x 2 – 20x - 1

B. x 2 – 9 x – 20 D. x 2 – x – 20

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