Question:

How to solve "(f(x+h)-f(x))/h and simplify if f(x)=x^2-2x?"?

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How to solve "(f(x+h)-f(x))/h and simplify if f(x)=x^2-2x?"?

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  1. [f(x + h) - f(x)] / h = [(x + h)^2 - 2(x + h) - (x^2 - 2x)]/h =

    = (x^2 + 2xh + h^2 - 2x - 2h - x^2 + 2x)/h = (2xh + h^2 - 2h)/h =

    = 2x + h - 2

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