# Product rule

if im trying to find the derivative of y=3x(x-4)(x+2) do i multipy the 3x through first or go right to the product rule ad if i do multiply it through do i multipy it through both terms
(3x^2-12x)(3x^2+6x) or
3(3x^2-12x)(x+2)

berkeman
Mentor
Thread moved to Homework Help, Calculus. dcgirl16, homework and coursework questions belong in the appropriate Homework Help forum, not in the main forums.

And on your question, for me it's easiest to multiply it out first before taking the derivative, at least in this particular problem.

multiply everything out, like you did in your first suggestion, but then multiply those together ((3x^2-12x)(3x^2+6x)) then take the derivative.

Dick