Answer:
f(x) = -x³ + 3x² + 4x - 12
Step-by-step explanation:
f(x)=(x+2)(-x+3)(x-2)
Step 1. Use the difference of two squares
(x + 2)(x - 2) = x² - 4
f(x) = (-x + 3)(x² - 4)
Step 2. Long multiplication
x² - 4
-x + 3
-x³ + 4x
+ 3x² - 12
-x³ + 3x² + 4x - 12
f(x) = -x³ + 3x² + 4x - 12
