Finding

and

Put

so (eroare: eq.4/58814)$$I=\frac{1}{(2t^2+5t+2)^2}dt$$

Did not understand how to solve further


(eroare: eq.5/58814)$$J=\int^{\pi}_{0}\frac{1}{\sqrt{3+2\cos x}}dx=\displaystyle\in^{\pi}_{0}\frac{1}{\sqrt{3-2\cos x}}dx$$

Did not understand how to solve further, Help me

It is hard to understand what is given.
Please also use a singe "equation environment" like [eq uation] (the hole is to inhibit mark-up).

For instance:

[Citat] Did not understand how to solve further, Help me

Please press that "cite" button [Citeaza] to see how it was typed,
and adjust the above so that it makes sense.

There is also a sand box here, "cutia cu nisip":
http://pro-didactica.ro/forum/index.php?forumID=24

where pieces of code can be tested. (A latex install on the own machine is probably better.)

Thanks admin got it