Question

What is the product of (z-4)(-z+2)(z+8)

Answer 1

FOIL the first two terms, then its a binomial x trinomial. Multiply those.

Answer 2

(z-4)(-z+2)(z+8)

Multiply the first two brackets together

\[(-z ^{2} + 2z + 4z -8)(z + 8)\] Combine all like terms and then move to the next step (:

\[(-z^2 + 8z - 8) (z + 8) \]
\[(-z^3 -8z^2 + 8 z ^2 + 64z - 8z - 64)\]
\[-z^3 + 56z - 64\]