f(x)=2x^2-3x+5 and g(x)=x-4

Question

find: (f+g)(x)

find: (f-g)(x)

find: (f*g)(x)

Answer 1

f +g = 2x^2 - 2x + 1

f-g = 2x^2 - x + 9

f*g = 2x^3 - 3x^2 + 5x - 8x^2 + 12x - 20

= 2x^3 - 11x^2 + 17x - 20