The equation is .

                        (Divide each side by 5)

            (Add 1 to each side)

                  (Add: )

The perfect square of the given trinomial .

               (Take the square root of each side)

Apply square roots property: If then .

Apply addition property of equality: If a = b then .

        (Add 1 to each side)

                    (Apply additive inverse property: )

Using the calculator and evaluate square roots.

Separate the solutions .

The solution set is .