1. The problem statement, all variables and given/known data Use the definition of a derivative to compute the derivative of the function at the given value. P(t)=t^3-4, t=-2 2. Relevant equations Please help me solve it in this form: f(a+h)-f(a)/h lim h→0 3. The attempt at a solution (-2+h)^3-(-2^3)-4/h=(h^3-6h^2+12h-4)/h=h^2-6h+8=0-0+8=8 I am sick and tired of using the exact method the textbook gives me and getting answers that are miles off.