$\"\"$

\

The equation is $\"\"$ .

\

The equation is a perfect square trinomial.

\

$\"\"$

\

Take square root on each side.

\

$\"\"$

\

$\"\"$

\

Add 6 to each side.

\

$\"\"$

\

Apply additive inverse property: $\"\"$ .

\

$\"\"$

\

$\"\"$

\

$\"\"$ $\"\"$

\

Check:

\

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

\

$\"\"$

\

Apply sum of squares formula: $\"\"$ .

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

The first solution $\"\"$ is true. $\"\"$

\

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

\

$\"\"$

\

Apply formula: $\"\"$ .

\

$\"\"$

\

$\"\"$

\

Product of two same sings is positive.

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

The second solution $\"\"$ is true. $\"\"$

\

The values of $\"\"$ .