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