Unformatted text preview: Example: 2x 2 + 9x + 10 = 2x 2 + 4x + 5x + 10 = 2x(x + 2) + 5(x + 2) = (x + 2)(2x + 5) The key here is to find two numbers that add to 9 but multiply out to 2x10 = 20. Those numbers are 4 and 5 so you rewrite 9x as 4x+5x. There are nearly countless other forms of factorization, but these are the ones most commonly used....
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 Fall '09
 Crandall
 Anthropology, Algebra, Multiplication, Greatest common divisor

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