Solve u^2=4 where u is a real number.
Simplify your answer as much as possible.
If there is more than one solution, separate them with commas.
If there is no solution, click on "No solution".
The equation is u^2 = 4.
Taking the square root of both sides, we get u = ± √4.
Simplifying, we have u = ±2.
Therefore, the solutions to the equation are u = 2 and u = -2.