SOLUTION: f(x) = x^2 + 2 and g(x) = 2x - 3. Find f (g (-1))

Algebra ->  Functions -> SOLUTION: f(x) = x^2 + 2 and g(x) = 2x - 3. Find f (g (-1))       Log On


   

Question 859375: f(x) = x^2 + 2 and g(x) = 2x - 3. Find f (g (-1))
Answer by josgarithmetic(39628) About Me  (Show Source):
You can put this solution on YOUR website!
Form the composition function and assign x=-1, and evaluate.

f%28g%28x%29%29=%282x-3%29%5E2%2B2
4x%5E2-12x%2B9%2B2
4x%5E2-12x%2B11
-
At x=-1, f%28g%28-1%29%29=4%28-1%29%5E2-12%28-1%29%2B11=4%2B12%2B11=highlight%2827%29