Answer
The equation has no real number solution.
Work Step by Step
Subtract on both sides of the equation to obtain:
$x^2=-16$
Note that for any real number $x$, $x^2 \ge 0$.
Thus, the given equation has no real number solution.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.