$\"\"$

The equation is $\"\"$ .

$\"\"$ (Square each side and eleminate the square roots)

$\"\"$ (Evaluate power: $\"\"$ )

Apply division property of equality: a = b, then $\"\"$ .

$\"\"$ (Divide each side by 7)

$\"\"$ (Cancel common terms)

$\"\"$ (Divide: $\"\"$ ) $\"\"$

Check:

To check the solution substitute $\"\"$ in $\"\"$ .

$\"\"$

$\"\"$ (Multiply: $\"\"$ )

$\"\"$ (Evaluate square roots: $\"\"$ )

The solution is "True". $\"\"$

The solution is "True".