I did
I got
Is this correct ?
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I used parts
I know you could do u =x -1
But is my way wrong ?
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i did
u ^2 = (4x^2 +1)
I got the integral to
Is this right ?
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I just want you to tell me if i'm right because my book gives different answers when i do the integral my way.
sorry, just now my mischief cousin playing with my laptop. your method are correct indeed. so sorry if he offended you.
the one you solve using integration is not encouraged. the working could be quite tedious. but u can free to use any substitution and method u like. as long as the answer is correct.
Wolfram Mathematica Online Integrator
this is online integrator, quite useful. you can always check the final answer is correct or not.
once again, sorry for what my cousin had done to u.