Identify a, b, c: Identify a, b, and c in the quadratic expression 2v2+9v+9. Compare 2v2+9v+9 with ax2+bx+c. a=2b0b1
Find two numbers: Find two numbers that multiply to a∗c (2∗9=18) and add up to b (9).We need to find two numbers that multiply to 18 and add up to 9.The numbers 6 and 3 satisfy these conditions because 6∗3=18 and 6+3=9.
Rewrite middle term: Rewrite the middle term of the quadratic expression using the two numbers found in Step 2.2v2+9v+9 can be rewritten as 2v2+6v+3v+9.
Factor by grouping: Factor by grouping.Group the terms: 2v2+6v + 3v+9.Factor out the common factor from each group.From the first group, factor out 2v: 2v(v+3).From the second group, factor out 3: 3(v+3).
Factor out common binomial: Factor out the common binomial.We have 2v(v+3)+3(v+3).The common binomial is (v+3).Factor out (v+3) to get (v+3)(2v+3).
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