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# Math AB Chapter 8 Polynomials

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Trial on Polynomials.

Trial on Polynomials.

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• 1. MATH A Chapter 8 Review MULTIPLYING POLYNOMIALS
• 2. What do we know about Polynomials? Degree - Binomial - Trinomial - When you multiply you ________ exponents. When you divide you _________ exponents.
• 3.
• 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
• 4.
• Try these:
• (x – 3)(2x + 4)
• (6y – 1)(2y + 5)
• 3. (5z – 10)(3z – 3)
• 5.
• 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
• 6.
• Allright…..that was a good review…… NOW,
• Let’s Practice…..
• 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
• 8.
• 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
• 9. 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
• 10.
• 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)