I'm supposed to solve this using an integral table and substitution.

I attempted to solve by rewriting the denominator as Sqrt((8x)^{2}+9^{2}) then using to solve, substituting u=8x.

Thereby getting the answer ln|8x+sqrt((8x)^{2}+9^{2})|+C however this is apparently not correct. Any help?

*Edit: My provided integral table can be found here