To find the roots/zeros, set equal to and solve.

Factor out of .

Factor out of .

Factor out of .

Rewrite as .

Factor out of .

Factor out of .

Factor using the perfect square rule.

Rewrite as .

Check the middle term by multiplying and compare this result with the middle term in the original expression.

Simplify.

Factor using the perfect square trinomial rule , where and .

Multiply each term in by .

Multiply .

Multiply by .

Multiply by .

Multiply by .

Set the equal to .

Subtract from both sides of the equation.

(Multiplicity of )

Identify the Zeros and Their Multiplicities -x^2-8x-16