The equation is .

      (Subtract 13y from each side)

                      (Apply additive inverse property: )

.                      (Apply commutative property: )

In this trinomial, .Either m or p is negative, but not both.

Since b is negative, the factor with the greater absolute value is also negative.

List the factors of , where one factor of each pair is negative.

Look for the

Apply the pattern: .

         (Substitute )

      (Apply distributive property: )

    (Apply distributive property: )

             (Apply distributive property: )

Use the principle of zeroproducts, which says, if ab=0, either a , b or both must be equal to zero.

           (Subtract 5 from each side)

                 (Apply additive inverse property: )

                        (Apply additive identity property: )

.                                   (Subtract: )

      (Add 18 to each side)

                (Apply additive inverse property: )

                             (Apply additive identity property: )

.                            (Apply additive identity property: )

Check:

To check, substitute or in equation .

      (Substitute  )

        (Evaluate powers: )

                 (Subtract: )

                      (Multiply: )

The equation is true.

The roots are .