Question

solve the formula for the indicated variable.
area of a square with side length s.
$a = s^{2}$; solve for s

Explanation:

Step1: Isolate $s$ via square root

Take square root of both sides:
$$\sqrt{A} = \sqrt{s^2}$$

Step2: Simplify the right-hand side

Simplify $\sqrt{s^2}$ to $s$ (since side length is positive):
$$\sqrt{A} = s$$

Answer:

$s = \sqrt{A}$