Question

Given f(x) = x ^ 2 + 3x and g(x) = 2x ^ 2 find (f g) (- 1) .

Type answer only in the box.

Answer 1

-4

Explanation:

You want the value of (f·g)(-1) when f(x) = x² +3x and g(x) = 2x².

Product

The product of the functions is the product of their values for each value of x.

(f·g)(-1) = f(-1)·g(-1) = ((-1)² +3(-1)) × (2(-1)²) = (1-3)(2·1) = (-2)(2)

(f·g)(-1) = -4