Question 660798
{{{f(x) = 3x^2-4}}}


{{{f(x+h) = 3(x+h)^2-4}}}


{{{f(x+h) = 3(x^2+2xh+h^2)-4}}}


{{{f(x+h) = 3x^2+6xh+3h^2-4}}}


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{{{(f(x+h)-f(x))/h = (3x^2+6xh+3h^2-4-(3x^2-4))/h}}}


{{{(f(x+h)-f(x))/h = (3x^2+6xh+3h^2-4-3x^2+4)/h}}}


{{{(f(x+h)-f(x))/h = (6xh+3h^2)/h}}}


{{{(f(x+h)-f(x))/h = (h(6x+3h))/h}}}


{{{(f(x+h)-f(x))/h = 6x+3h}}}


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