Take the anti derivative of (X^2)/sqrt(1-x)soln'let u=1-x

[johnnyboy2005]

take the anti derivative of (X^2)/sqrt(1-x)

soln'... let u=1-x... then -du=dx and x^2 = (1-u)^2 (sub back in)...

this gives me -2*u^(1/2)*(15-10*u+3*u^2) /15... (sorry for lack of proper terms)


anyway, this turns out to be wrong...where did i go wrong here?

 

[benorin]

Try this:

\int \frac{x^2}{\sqrt{1-x}}dx = -\int \frac{(1-u)^2}{\sqrt{u}}du = -\int u^{-\frac{1}{2}}(1-2u+u^2) du

then distribute the u^{-\frac{1}{2}} term over the quadratic and integrate

 

[johnnyboy2005]

yeah...that's what i was getting but it was in a different form. Thanks a lot !1