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Published byJerome Marsh Modified over 9 years ago
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Lesson 9-7 F.O.I.L. Method by Kassandra and Sammie Warm Up: Find each product. 1.-4m 3 (5m 2 +2m) 2.-4d(7d 2 -4d+3) Simplify. 3. b(4b-1)+10b 4. 8m(-9m 2 +2m-6)+11(2m 3 -4m+12) Short Answer. 5. What is a binomial?
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Lesson 9-7 Multiplying Polynomials F.O.I.L. Method EQ: What does F.O.I.L. mean? To multiply two binomials, find the sum of: F- the First terms O- the Outer terms I- the Inner terms L- the Last terms
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(7x+2) (5x+1) Multiply the First terms. Multiply the Outer terms. Multiply the Inner terms. Multiply the Last terms. 7x*5x=35x 2 7x*1=7x 2*5x=10x 2*1=2 35x 2 +7x+10x+2 35x 2 +17x+2
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(x-4)(x+9) F: x*x=x 2 O: x*9=9x I: (-4)*x=(-4x) L: (-4)*9=(-36) x 2 + 9x+ (-4x)+ (-36) x 2 + 5x+(-36)
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1.(c-3)(c-7) 2.(w+3)(w-9) 3.(5b+3)(2b+1) 4. (6v+3)(2v+7)
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F: First Terms O: Outer Terms I: Inner Terms L: Last Terms If you still have questions, use the book on page 537.
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