Question

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

Answer 1

\(\large \frac{f(x+h)-f(x)}{h}\)
since f(x)=x^2-2x, then:
\(\large \frac{f(x+h)-f(x)}{h}=\frac{[(x+h)^2-(x+h)]-[x^2-x]}{h}\)

can you simplify from here?

Answer 2

no. what happens from there?

Answer 3

simplify....
expand the binomial in the numerator and get rid of all the parenthesis and combine like terms...

Answer 4

okay, thank you!

Answer 5

ok.... yw...:)