unkabogable
help me to integrate



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unkabogable
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dw:1354504731249:dw

viniterranova
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We will see.

Minneemse
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please someone help me with my problem!!!

anonymous
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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

lrbrock
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\[\int\limits_{a}^{b} (x+3) * (x^2 + 2x +5)^1 dx\]

hieuvo
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dw:1354504176605:dw

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

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

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

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

unkabogable
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okay ..

unkabogable
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from the top pls.?

unkabogable
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dw:1354505864451:dw
?

hieuvo
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dw:1354504775593:dw

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

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

hieuvo
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dw:1354505287482:dw

unkabogable
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its unclear to me :(

hieuvo
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dw:1354505588414:dw

hieuvo
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is that what you're confused ?

unkabogable
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okay i get it now thanks! :)

hieuvo
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you're welcome