The expression you posted doesn't look right.
Are you looking for the simplification of
((x+h)²-2(x+h) - x² +2x)/h ?
How would you simplify
(-x^2+2xh+h^2-2x-2h-2x^2+4x)/h ?
2 answers
Oh! I think I made a mistake in writing out the equation! thanks for pointing it out. I know what to do now thank you!