Question

If f(x)=2x^2+5 and g(x)=x^2-2 find (f-g)(x)

Answer 1

x² + 7

Explanation:

note that (f - g)(x) = f(x) - g(x)

= 2x² + 5 - (x² - 2)

= 2x² + 5 - x² + 2 ← collect like terms

= x² + 7