Math Help - A little algebraic thing I don't get in this math video

1. A little algebraic thing I don't get in this math video

In this video (Improper Integral with an Infinite Discontinuity in the interval), at 2:48, I don't understand how he gets -ln(2) because I would of gotten -ln|e^(-1) - 1|.

Any input would be greatly appreciated!

2. Originally Posted by s3a
In this video (Improper Integral with an Infinite Discontinuity in the interval), at 2:48, I don't understand how he gets -ln(2) because I would of gotten -ln|e^(-1) - 1|.

Any input would be greatly appreciated!