Use the link below for more practice/help.
https://www.khanacademy.org/math/algebra2/polynomial_and_rational/factoring-higher-deg-polynomials/v/factoring-sum-of-cubes
http://www.regentsprep.org/regents/math/algtrig/ate13/highpolylesson.htm
HW: WS 5.3 front side oonly