find the slope of the tangent line whose g(x)=x^2-4 at point (1,-3)
lim f(x+Δχ) -F(c)/ (Δχ)
The Attempt at a Solution
G(1+Δχ)= (1+Δχ)^2-4 ==> Δχ^2+2Δχ-3
lim (Δχ^2+2Δχ-3) - (-3)/(Δχ) = 0
but in the book the answer is 2 so what could I've done wrong?