algebra
posted by drew .
Find f(x)·g(x) if f(x) = 3x and g(x) = x + 1.
A. 3x2 + 3x
B. 3x + 1
C. 4x + 1
D. 3x2 + 1
D

f(x) · g(x) = 3x(x+1)
= 3x^2 + 3x
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