Question

solve for u. u² = 25 u = or

Explanation:

Step1: Apply square - root property

Take the square root of both sides of the equation $u^{2}=25$. We know that if $x^{2}=a$ ($a\geq0$), then $x = \pm\sqrt{a}$.
$u=\pm\sqrt{25}$

Step2: Calculate the square - root value

Since $\sqrt{25}=5$, we have $u = 5$ or $u=- 5$.

Answer:

$u = 5$ or $u=-5$