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Please post the interval to get the average rate of change for f(x) = x^2 - 4x - 5.
From x to x+h. Sorry I forgot to put this in.
Ok, no problem!
The formula is:
Plugging in those values:
= ((x+h)^2 - 4(x+h) - 5 - (x^2 - 4x - 5))/h
= (x^2 + 2xh + h^2 - 4x -4h - 5 - x^2 + 4x + 5)/h
Combine like terms:
= (2xh + h^2 -4h)/h
Divide through by the h:
= 2x + h - 4
Let me know if you have any questions,