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.
    • YOUR TURN!
    • 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)