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integral problem

Why is it incorrect? I feel like I've done everything right with this integral. Am I not allowed to use integration by substitution when there is a problem like this?


thanks for any help in advance
tsr help 109.1.JPG125.0KB
You have subtracted 121−u\tfrac 1 {2 \sqrt {1 - u}} instead of multiplying. You haven't done anything wrong but you've got arguably a harder integral than you started with.

Substitution isn't the best way to go here, try partial fractions.
you could also try a trig substitution, factor out the 2 and use the tan trig substitution 😊 just another apraoch
Original post by _gcx
You have subtracted 121−u\tfrac 1 {2 \sqrt {1 - u}} instead of multiplying. You haven't done anything wrong but you've got arguably a harder integral than you started with.

Substitution isn't the best way to go here, try partial fractions.

I can't believe mistakes like this keep me up so long....

thanks for the help bro appreciate it
Original post by Joshwoods01
you could also try a trig substitution, factor out the 2 and use the tan trig substitution 😊 just another apraoch

thanks a lot

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