f(x) - 20=20x+7;g(x) = -3x (13)f (x)=x^2+ 2x -1;g(x)=3x - 5?

Question

find f + g and f - g?

Answer 1

f+g means f(x) + g(x) sooo

on the right (which is the only one I can sort)

[x^2+2x-1]+[3x -5] = x^2+5x-6

f-g would be f(x)-g(x)
soo:
[x^2+2x-1]-[3x -5] = x^2-x+4 (don't forget to distribute that negative!)

Answer 2

f=47
if that helps