Answer with step-by-step explanation:
The first three steps of completing the square to solve the quadratic equation
are given in the question which include:
Step 1:

Step 2:

Step 3:

So the next three steps will be:
Step 4:

(taking square root on both sides of
to get
)
Step 5: solve for x(
, (
(solve for x)
Step 6:
or

(evaluate)