Identify coefficients: Identify the coefficients a, b, and c in the quadratic expression 2u2+9u+9 by comparing it to the standard form ax2+bx+c.a=2, b=9, c=9
Find factorable numbers: Find two numbers that multiply to ac (a×c) and add up to b. In this case, ac=2×9=18, and we need two numbers that multiply to 18 and add up to 9.
Rewrite middle term: The two numbers that satisfy the conditions are 3 and 6 because 3×6=18 and 3+6=9.
Group terms for factoring: Rewrite the middle term 9u using the two numbers found in the previous step. This will allow us to split the middle term for factoring by grouping.2u2+9u+9 becomes 2u2+3u+6u+9.
Factor out common factors: Group the terms into two pairs and factor out the common factor from each pair.From 2u2+3u, factor out u to get u(2u+3).From 6u+9, factor out 3 to get 3(2u+3).
Final factored form: Notice that both groups now have a common binomial factor 2u+3. Factor out the common binomial factor.The factored form is u+32u+3.
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