Question

solve for u.
|u| = 4
if there is more than one solution, separate them with commas.
if there is no solution, click on
o solution\.

Explanation:

Step1: Apply absolute value definition

The absolute value equation $|u|=4$ means $u$ can be the positive or negative value of 4.

Step2: List possible solutions

This gives two cases: $u=4$ or $u=-4$

Answer:

$4, -4$