Respuesta :

WY1219
F(a)=a^2-5a+7

F(a+h)=(a+h)^2-5(a+h)+7
=a^2+2ah+h^2-5a-5h+7

F(a+h)-F(a)=(2ah+h^2)/h


Factor out h, we will have h(2a+h)/h, the answer is 2a+h

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