9.5 notes student copy - 9-5 Notes Factoring Trinomials...

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Unformatted text preview: 9-5 Notes Factoring Trinomials Name: _________________ x 2 + bx + c : Review: Multiply ( x + 2)( x + 3) Factoring is Un-FOILing Factor and Check. x 2 + 7 x + 10 How could we do this, is there a GCF we can pull out? 1) Build a big X and put the product of x2 and 10 in the top of the X. Then put 7x in the bottom of the X. 2) Now ask yourself what multiplies to 10 x 2 and adds up to 7x. Put those two quantities on the sides of the X. 3) Build a square with four parts. Put the x 2 in the upper LEFT and the 10 in the bottom RIGHT, and the quantities you found in step two in the other two boxes. 4) Find the GCF of each row and column of your box. These two expressions are your answer. Try these: 1) v 2 + 21v + 20 Answer: _________________ Check 2) q 2 - 15q + 36 3) x 2 + 13 x + 30 ...
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This note was uploaded on 05/16/2011 for the course ALGEBRA 098 taught by Professor Johnson during the Spring '09 term at Grand Valley State University.

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9.5 notes student copy - 9-5 Notes Factoring Trinomials...

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