SOLUTION: Hello! I am trying to figure out these integrals but I keep getting stuck. (also, not sure how to write the integral symbol in the editor on here, so hopefully my question makes

Question 1026953: Hello!
I am trying to figure out these integrals but I keep getting stuck. (also, not sure how to write the integral symbol in the editor on here, so hopefully my question makes sense).
1. integral:
I tried U-substitution but got stuck...not sure if I did it right or not.

2. integral:
Thank you, in advance!
Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
This site supports some basic LaTeX commands, and you can type it out as such:

Here, a simple u-substitution probably won't work since there is no x term (u = 9x^2 - 1, du = 18x dx - if the integral had been 6x instead of 6, then a u-substitution works).

I don't know if you learned about using a trigonometric substitution, but you can use the substitution

and using the fact that

.

2. Do you mean

?

If so, you can do a u-substitution.
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