$\"\"$

The quadratic equation is $\"\"$ .

The general form of the quadratic equation is $\"\"$ .

The quadratic formula $\"\"$ .

Consider $\"\"$ .

Add $\"\"$ to each side.

$\"\"$

Subtract $\"\"$ from each side.

$\"\"$

Compare the above equation with general form.

$\"\"$ .

Substitute the values of $\"\"$ in quadratic formula.

$\"\"$

The value of $\"\"$ .