1. Find (f-g)(x) if f(x)=4x²-5x and g(x)=3x²+6x-4.
(f-g)(x)=x²-11x+4
(f-g)(x)=-x²-x⁴
(f-g)(x)=7x²+x-4
(f-g)(x)=-x²+11x-4