SOLUTION: Let f(x)=-1-x-2x2, evaluate using f(x+h)-f(x)/h Factor out the negative sign for the final answer, if any.

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Question 1121107: Let f(x)=-1-x-2x2, evaluate using f(x+h)-f(x)/h
Factor out the negative sign for the final answer, if any.
Answer by josgarithmetic(39625) About Me  (Show Source):
You can put this solution on YOUR website!
The general quotient you are looking for is with the added parentheses, %28f%28x%2Bh%29-f%28x%29%29%2Fh.


You could start this way:

f%28x%2Bh%29=-1-%28x%2Bh%29-2%28x%2Bh%29%5E2
-1-x-h-2%28x%5E2%2B2hx%2Bh%5E2%29
-1-x-h-2x%5E2-4hx-2h%5E2

AND

f%28x%29=-1-x-2x%5E2


Now just put everything together according to your general quotient and simplify.