The quadratic equation is
.
Solve the above quadratic equation by completing the square.
\Consider
.
Divide each side by 2.
\
Add 4 to each side.
\
\
To change the expression into a perfect square trinomial add
to each side of the equation.
Here x coefficient =
.
So,
.
Add
to each side.

Take the square root of each side.
\
Subtract
from each side.

The solutions are
.