Given f ( x ) = x^ 2 - 1, find the value .f(x+h)-f(x)/h

Its due ! write an equation in which the quadratic expression 2x^2-2x 12 equals 0. show the expression in factored form and explain what your solutions mean for the equation. show your work.

Can anyone explain to me how to do this? anything will .

The ordered pair (2,-5.2) is located in quadrant iv