Definite Integral with u/du subsitition

[Nathalie]

The question is right below the instruction and after that question is my steps. Please correct me if I have made mistake somewhere along the way or if I am doing it incorrectly. I get stuck at the last step because I am not sure what I should do to the 2 in front of u^1/2. Please help. Thank you very much.

Evaluate the indefinite integral by the method shown in Example 5. (the example in the book is just using the u and du substitution)

 

[wjm11]

I am not sure what I should do to the 2 in front of u^1/2.

The 2 will not affect your integration. You can move the 2 "out front" (to the left) of the integral, perform the integration on u^1/2, and multiply the answer by 2. Make sense?

 

[Nathalie]

Thank you so much.
I was confused because I couldn't get the same answer as the book and I thought that was where the problem occurred. (I found out later I was looking at the wrong page for the answer :lol: )