Question

Please help. How do I integrate the following integral: ...

Answer 1

http://www.ehow.com/how_2258560_integrate-substitution.html

Answer 2

\[\int\limits_{2}^{5} {\sqrt{\frac{ x^4 + 8x^2 + 16 }{ 16x^2 }}}dx\]

Answer 3

Try factorizing the numerator first.
Hint: Look for a perfect square to remove the squareroot.

Answer 4

\[x^{4}+8x ^{2}+16=(x ^{2}+4)^{2}\]
does this help??