Question

solve for s. 81 = s^2 s = or

Explanation:

Step1: Apply square - root property

Take the square root of both sides of the equation $81 = s^{2}$. We know that if $x^{2}=a$ ($a\geq0$), then $x=\pm\sqrt{a}$. So, $s=\pm\sqrt{81}$.

Step2: Calculate the square root

Since $\sqrt{81}=9$, then $s = 9$ or $s=- 9$.

Answer:

$s = 9$ or $s=-9$