Question

Given f(x) = 3x2 + 7x and g(x) = 2x2 - x - 1, find (f - g)(x)

Answer 1

`(f - g)(x) = {x}^(2) + 8x + 1`

Explanation:

`(f - g)(x) = f(x) - g(x) \\ = (3 {x}^(2) + 7x) - (2 {x}^(2) - x - 1) \\ = (3 {x}^(2) + 7x) + ( - 2 {x}^(2) + x + 1) \\ = {x}^(2) + 8x + 1`

I hope I helped you^_^