## unkabogable 2 years ago help me to integrate

1. unkabogable

|dw:1354504731249:dw|

2. viniterranova

We will see.

3. Minneemse

please someone help me with my problem!!!

4. satellite73

i would start with $\frac{x+2}{x^2+2x+5}+\frac{1}{x^2+2x+5}$ because the first one gives way to a simple $$u$$ sub the second one is a pain though

5. lrbrock

$\int\limits_{a}^{b} (x+3) * (x^2 + 2x +5)^-1 dx$

6. hieuvo

|dw:1354504176605:dw|

7. satellite73

i guess not that much of a pain complete the square, solution above

8. unkabogable

|dw:1354505437528:dw| u = x+1 ; a= 2 ?

9. hieuvo

the first one, let u be the denominator, then du will be x+2dx, so this is regular integrate(1/u)du

10. hieuvo

i would make the first numerator x+1, the second numerator is 2

11. unkabogable

okay ..

12. unkabogable

from the top pls.?

13. unkabogable

|dw:1354505864451:dw| ?

14. hieuvo

|dw:1354504775593:dw|

15. hieuvo

and the other one just like above but multiplied by 2 :D

16. unkabogable

for the second one? |dw:1354506253527:dw| kinda impossibele @hieuvo

17. hieuvo

|dw:1354505287482:dw|

18. unkabogable

its unclear to me :(

19. hieuvo

|dw:1354505588414:dw|

20. hieuvo

is that what you're confused ?

21. unkabogable

okay i get it now thanks! :)

22. hieuvo

you're welcome