Q35 of 134 Page 4


Using factorization, find the roots of the quadratic equation: z 2-2z-8= 0.


z 2 - 2z - 8 = 0
z 2 – 4z + 2z - 8 = 0
z(z – 4) + 2(z – 4) = 0
(z – 4)(z + 2) = 0
z = 4 or z = -2.

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