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Intergration question watch

1. how do you intergrate

x(4-x^2)^0.5

tried using substitution and by parts and they dont work........

plz help!!!!!

thanks
2. Substitution should work; what's the derivative of 4 - x^2 ?
3. Substitution does work.

edit: Damn you, GA
4. x is -1/2du
so its a substitution intergration
5. (Original post by Glutamic Acid)
Substitution should work; what's the derivative of 4 - x^2 ?
What did you use to sub? 4-x^2 or (4-x^2)^0.5 ?

derivative of 4-x^2 is -2x
6. (Original post by Grimmjow)
What did you use to sub? 4-x^2 or (4-x^2)^0.5 ?

derivative of 4-x^2 is -2x
And -2x differs from x by a constant multiplier, (-1/2), so u = 4 - x^2 will work.
7. thanks ppl got it

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