» Given the definitions of f(x) and g(a) below, find the value of (f • g)(-4).
Substitute the value of x into the given value which is -4. Lets simplify it.
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To solve for (fog)-4)
Replace x in the g(x) equation with -4 and solve, then replace x in f(x) with the solution and solve for final answer.
G(x) = -4(-4) -12 = 16 -12 = 4
F(x) = 3(4)^2 -5(4) -4 = 48 -20 -4 = 24
The answer is 24
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