4/13/17 Week 2 Thursday daily sheet: Multiplying polynomials (including using FOIL) Daily aims: 1. I can multiply polynomials by monomials. 2. I can multiply two binomials (for example, by using FOIL). Before lesson Please do not use a calculator for these. 1) Write the missing exponent: During lesson (3 • 3) (3 • 3 • 3 • 3) = 3 • 3 • 3 • 3 • 3 • 3 (3 ) (3 ) = 3 2) Simplify. Express your answer as a power of 4. (43)(45) = 3) Simplify. Express your answer as a power of x. (x3)(x5) = 5) Simplify. 4a) 2a3(3a4) = 4b) 3b(4b2) = 4c) –6(8c) = 4d) 7a2b(2ab3) = 3(2x + 5) D. Stark 3/17/2017 1 6a) 4d2(5d4 + 7d3) = 6b) 5ef(2e2 – 3e) = Use FOIL to multiply the binomials. Remember to combine the 2 like middle terms at the end. 7a) (2g + 4)(3g + 8) = 7b) (–3h + 4)(h – 5) = 8) If you’re a visual person, you might prefer the box method. Try that for (4j – 7)(3j + 6) = 4j –7 3j 6 D. Stark 3/17/2017 2 4/13/17 Week 2 Thursday daily sheet: Multiplying polynomials (including using FOIL) KEY Daily aims: 1. I can multiply polynomials by monomials. 2. I can multiply two binomials (for example, by using FOIL). Before lesson Please do not use a calculator for these. 1) Write the missing exponent: During lesson (3 • 3) (3 • 3 • 3 • 3) = 3 • 3 • 3 • 3 • 3 • 3 6 4 2 (3 ) (3 ) = 3 2) Simplify. Express your answer as a power of 4. (43)(45) = 48 According to the product rule of exponents, when you’re multiplying and the bases are the same, you just add the exponents. 3) Simplify. Express your answer as a power of x. (x3)(x5) = x8 The rule works the same way for variable bases as for number bases. D. Stark 3/17/2017 3 5) Simplify. 4a) 2a3(3a4) = 6a7 4b) 3b(4b2) = 12b3 4c) –6(8c) = –48c 4d) 7a2b(2ab3) = 6a) 4d2(5d4 + 7d3) = 20d6 +28d5 6b) 5ef(2e2 – 3e) = 10e3f – 15e2f (Remember b = b1.) 14a3b4 3(2x + 5) 3(2x) + 3(5) = 6x + 15 Use the distributive property. D. Stark 3/17/2017 4 Use FOIL to multiply the binomials. Remember to combine the 2 like middle terms at the end. 7a) (2g + 4)(3g + 8) = = 6g2 + 16g + 12g + 32 = 7b) 6g2 + 28g + 32 (–3h + 4)(h – 5) = = –3h2 + 15h + 4h – 20 = –3h2 + 19h – 20 8) If you’re a visual person, you might prefer the box method. Try that for (4j – 7)(3j + 6) = 4j –7 3j 6 = 12j2 + 24j –21j – 42 = 12j2 + 3j – 42 D. Stark 3/17/2017 5
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