I have the equation (x^2)/(sqrt(x+1)) This one has been stumping me, not sure how to reduce the derivative properly much less solve for 0. I get it down to this using the quotient rule: ((x+1)^(1/2)*2x - x^2*1/2(x+1)^(-1/2)) / (x+1) Just started learning derivative a few weeks ago and they're still stumping me. I'm really terrible at simplifying these down. Once it's simplified down how would I solve for ZERO to find the crit points? Any help would be appreciated.