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Factor the polynomial: w^2 – 2wz – 8z^2

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Mlcparra16viz
We use the quadratic formula on a quadratic equation on w so:
w = 2z ± √(2²z²+32z²) = 2z ± √(36z²) = 2z ± 6z = 4z or -2z
                   2                      2                 2
So;
w²-2wz-8z²=(w-4z)(w+2z)