# integration

• November 3rd 2008, 10:26 PM
samdmansam
integration
how do I integrate ((-x^2)*sqrt(x))dx
please dont just answer, I can solve the rest but dont understand how to solve this one.
Thanks heaps
Sam
• November 3rd 2008, 10:33 PM
Soroban
Hello, Sam!

You'll kick yourself . . .

Quote:

How do I integrate: . $\int(\text{-}x^2)\sqrt{x}\,dx$

We have: . $\int\left(\text{-}x^2\right)\left(x^{\frac{1}{2}}\right)\,dx \;=\;-\!\!\int x^{\frac{5}{2}}\,dx\quad\hdots$ etc.

• November 3rd 2008, 10:33 PM
chiph588@
$x^{2}\sqrt{x} = x^{\frac{4}{2}}x^{\frac{1}{2}} = x^{\frac{5}{2}}$