The Goal

Find all real number solutions for the following equation:

The Mistake

Find the algebra mistake:

Need a hint? Look carefully at the red part of the algebra:

The Correction

An Explanation

Don't jump to conclusions. Show the intermediate step (see "The Correction") - it is almost impossible to make the mistake shown above if you do that.
(If we allow complex number solutions, then the solutions are x = ± i, where i is a square root of -1)