Identify a, b, c: Identify a, b, and c in the quadratic expression 3f2+8f+4 by comparing it with the standard form ax2+bx+c.a=3b=8b0
Find two numbers: Find two numbers that multiply to a∗c (which is 3∗4=12) and add up to b (which is 8).The two numbers that satisfy these conditions are 2 and 6 because:2×6=122+6=8
Rewrite middle term: Rewrite the middle term, 8f, using the two numbers found in the previous step.3f2+8f+4 can be rewritten as 3f2+2f+6f+4.
Factor by grouping: Factor by grouping. Group the first two terms together and the last two terms together.(3f2+2f)+(6f+4)
Factor out common factor: Factor out the greatest common factor from each group.The greatest common factor of 3f2 and 2f is f, so factor out f from the first group:f(3f+2)The greatest common factor of 6f and 4 is 2, so factor out 2 from the second group:2(3f+2)
Factor out common factor: Notice that both groups contain the common factor (3f+2). Factor out (3f+2) from the expression.f(3f+2)+2(3f+2) can be factored as (3f+2)(f+2).
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