## anonymous 3 years ago $\int _a^b \frac{dx}{y}$,where $y^2=ax^2+bx+c$

1. experimentX

reduce y in to this from (px + q)^2 + r

2. anonymous

where $y^2=ax^2+bx+c$

3. anonymous

sry i meant y^2

4. experimentX

do the same .. it wouldn't make any difference

5. anonymous

$1/a(x+b/2a)^2-b^2/4a+c/a 6. anonymous \[1/a(x+b/2a)^2-b^2/4a+c/a$

7. anonymous

i tried a euclidian sub of t $t=y+x\sqrt a$

8. experimentX

yeah .. then substitute u = Sqrt(a)(x + b/x) should be of the form |dw:1362742001381:dw|

9. anonymous

yeah to the first post or euclidean?

10. experimentX

??

11. anonymous

do you agree with the sub of$t=y+x\sqrt{a}$

12. experimentX

where did you get that y ... there is no such y.

13. experimentX

check your equation again ... don't put that y there ... there is no y involved. I think you are confused.

14. anonymous

i have to go now but i 'll try it