Originally Posted by

**Pi314** Yeah it uses substitution as previously stated, I actually was doing a problem like that earlier today.

Apparently any anti-deriv. problem that requires multiplication and/or division needs to be solved via subs. So far the examples I've come across follow this idea.

And at times you're not left with the "proper" dx so you might have to "break" one of the functions.

for instance, for the anti. derivative of (8x+8^(2x))(x^2+e^(2x)) dx you have to take out the 8 after making the second portion "u" and then you'll be left with (x^2+e^(2x)) dx and you can continue to solve the problem normally.