Question

If f(x)=4x^2+1 and g(x)=x^2-5, find (f-g)(x)

A. 5x^2-6
B. 3x^2+6
C. 3x^2-4
D. 5x^2-4

Answer 1

B

Explanation:

(f - g)(x) = f(x) - g(x) and

f(x) - g(x) = 4x² + 1 - (x² - 5) = 4x² + 1 - x² + 5 = 3x² + 6 → B