Q36 of 134 Page 4


Using factorization, find the roots of the quadratic equation: 6z 2-5z-21= 0.


6z 2 - 5z - 21 = 0
6z 2 - 14z + 9z - 21 = 0
2z(3z – 7) + 3(3z – 7) = 0
(2z + 3)(3z – 7) = 0
(2z + 3) = 0 or (3z – 7) = 0

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