Solve the equation
Now you solve the quadratic expression with the quadratic formula, or with inspection. We’ll use the quadratic formula:
Possible solutions are then:
Now you have to test the answer by inserting
(If you get a small deviation on the decimals when you test the solutions, it is due to the rounding):
Since Left side Right side is an extraneous solution.
Now you insert
(If you get a small deviation on the decimals when you test the solutions, it is the rounding).
Since Left side Right side, then is a solution.
The solution to the equation is then
Note! Testing the answer is a part of the solving method, because squaring can sometimes lead to extraneous solutions.