Question

Let Fx= x^3 + 2^x2 - 18 For what values of x is f(x) = 9 Enter your answers as a comma-separated list.

Answer 1

We have the following function f(x) = x^3+2x^2 -18. We want to solve the following equation

$x^3+2x^2-18=9$

By subtracting 9 on both sides, we get the equivalent equation

$x^3+2x^2-27=0$