Recent content by NSB3

I realized that I dropped the 0 on 20 and put 2 on the 4th line from the bottom. So then I got 40/3 as coefficient instead of 4/3 so my new final answer after distributing the 1/2 is ((x^2+20)^5/2)/5 - (20(x^2+20)^3/2)/3 +C is it right to distribute the 1/2 in?

Homework Statement the integral of x^3 (x^2 + 20)^1/2 Homework Equations use u substitution The Attempt at a Solution I think I have finally figured the problem out, can you confirm if this is the correct answer please? u=x^2 +20 x= sqrt(u-20) du= 2x dx integral of x^3 * sqrt( u) du/2x...