$\"\"$

\

The given funtion is $\"\"$ .

\

Substitute $\"\"$ in given funtion.

\

$\"\"$

\

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

\

Substitute $\"\"$ in given funtion.

\

$\"\"$

\

$\"\"$ (Zero product property: $\"\"$ ) $\"\"$

\

Substitute $\"\"$ in given funtion.

\

$\"\"$

\

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

\

The value of $\"\"$ .