# Short improper integral question (how to rewrite?)

## The Attempt at a Solution

I'm trying to rewrite the integral as shown

Most probably a real simple answer

Thank you

CompuChip
Homework Helper
In the first integral, try substituting x for -x.

I don't understand, wouldn't that be illegal to do?

Dick
Homework Helper
I don't understand, wouldn't that be illegal to do?

Yes, it would. But Compuchip meant to do a u-substitution. u=(-x), du=(-dx).

CompuChip