Question

If f(x) = 4 – x2 and g(x) = 6x, which expression is equivalent to (g – f)(3)

Answer 1

6 (3) - 4 + 32
hope this helped 

Answer 2

(g-f)(3)=g(3)-f(3)=(6(3))-(4-3²)=(18)-(4-9)=18-(-5)=18+5=23