$\"\"$ \ \

The equation is $\"\"$ .

Find the expression is $\"\"$ .

$\"\"$ (Original equation) \ \

$\"\"$ (Substitute $\"\"$ )

$\"\"$ (Sum of the squares: $\"\"$ )

$\"\"$ (Evaluate powers: $\"\"$ )

Therefore, the value of the expression $\"\"$ is $\"\"$ .

$\"\"$

Option C is right choice.