Posted by Denzel on Thursday, November 4, 2010 at 9:08pm.
Find all critical numbers:
(x^2+12)(9x^2)?

calculus  Michael, Thursday, November 4, 2010 at 11:09pm
ok. well first of all, use the product rule: f(x)g'(x) + g(x)f'(x) then set the derivative = to 0
(x^2 +12)(2x) + (9x^2)(2x)=0