At what point(s) on the curve f(x) = 2-4x³ does the normal have a slope of 3?
the normal has slope 3 when the tangent has slope -1/3
the tangent has slope -12x^2
-12x^2 = -1/3 when x^2 = 1/4
the tangent has slope -12x^2
-12x^2 = -1/3 when x^2 = 1/4