The given function is .

                         (Substitute f(x) = 0)

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

And multiply each side by .

Apply zero product property: .

The factors of 6: 3, 2 (or) 3, 2 (or) 1, 6 (or) 6, 1.

The correct factors are 3,2 and 6, So m = 3, n = 2.

Then write the factors form .

           (Group terms with common factors)

                (Factors the grouping terms)

                        (Take out common term )

Apply zero product property: If then a = 0 (or) b = 0.

Solve for first factor .

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

                            (Subtract 3 from each side)

Solve for second factor .

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

                           (Add 2 to each side)

The roots are 0, 3, and 2.