Difference Quotient: Quadratic Function

Example:  Find the difference quotient for f(x)=x^2-9x

The Difference Quotient:{f(x+h)-f(x)}/h


The Difference Quotient Formula
Write the difference quotient for the given function
Apply the exponent and use the distributive property
Combine the like terms
Combine the like terms.  Only terms with h should remain
Divide h into each term
Cancel the common h from each term