Question

Let f(x)=x^2-5x+8 and g(x)=x^2-4 (f-g)(x)=

Answer 1

What you do here is subtract g from f: x^2 - 5x + 8 - (x^2 -4); x^2 - 5x + 8 - x^2 + 4; Rearranging gives you x^2 - x^2 - 5x + 8 + 4 which is, simplified, -5x + 12