$\"\"$

The equation is $\"\"$ .

Solve the equation.

$\"\"$ (Original equation)

$\"\"$ (Subtract $\"\"$ from each side)

$\"\"$ (Apply additive inverse property: $\"\"$ )

$\"\"$ (Take square root on each side and simplify)

Therefore, the formula for the $\"\"$ is $\"\"$ .

$\"\"$

$\"\"$ .