Factor out of .

Factor out of .

Factor out of .

Factor out of .

Factor out of .

Let . Substitute for all occurrences of .

Consider the form . Find a pair of integers whose product is and whose sum is . In this case, whose product is and whose sum is .

Write the factored form using these integers.

Replace all occurrences of with .

Remove unnecessary parentheses.

Factor 2(3y-z)^2-2(3y-z)-4