I need help please

Question

For the following g pair of functions find (f+g)(x) and (f-g)(x)

 

F(x)=4x^2 +7x - 5 and g(x)= -7x^2 +5x -14

Answer 1

f+g:

 

(4x^2 - 7x^2) + (7x+5x) + (-5 + -14) =

 -3x^2 + 12x - 19

 

f - g:

 

 4x^2 + 7x - 5 + 7x^2 - 5x + 14=

  11x^2 + 2x + 9