SOLUTION: Let f(x)=x^2+4 and g(x)=2x+3 Find the expression. (g*f)(x)

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Let f(x)=x^2+4 and g(x)=2x+3 Find the expression. (g*f)(x)      Log On


   

Question 853199: Let f(x)=x^2+4 and g(x)=2x+3 Find the expression.
(g*f)(x)
Found 2 solutions by hamsanash1981@gmail.com, tommyt3rd:
Answer by hamsanash1981@gmail.com(151) About Me  (Show Source):
You can put this solution on YOUR website!
(g*f)(X) = g(f(x))
= g(x^2+4)
= 2(x^2+4)+3
=2x^2+8+3
= 2x^2+11

Answer by tommyt3rd(5050) About Me  (Show Source):
You can put this solution on YOUR website!
(g*f)(x)=
g(x)*f(x)=
(2x+3)(x^2+4)=
2x(x^2+4)+3(x^2+4)=
2x^3+8x+3x^2+12=
2x%5E3%2B3x%5E2%2B8x%2B12