Identify coefficients: Identify the coefficients a, b, and c in the quadratic expression 2q2+11q+9 by comparing it to the standard form ax2+bx+c. a=2, b=11, c=9
Find two numbers: Find two numbers that multiply to a∗c (2∗9=18) and add up to b (11).The numbers that satisfy these conditions are 2 and 9 because 2∗9=18 and 2+9=11.
Rewrite middle term: Rewrite the middle term 11q using the two numbers found in the previous step.2q2+11q+9 can be rewritten as 2q2+2q+9q+9.
Factor by grouping: Factor by grouping. Group the first two terms and the last two terms.(2q2+2q)+(9q+9)
Factor out common factor: Factor out the greatest common factor from each group. 2q(q+1)+9(q+1)
Final factorization: Since both groups contain the common factor (q+1), factor this out.(2q+9)(q+1)
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