Posted by JT on Sunday, July 11, 2010 at 9:49pm.
2x^2 + 5x - 12 = 0
2 X (-12) = -24 = 8 X (-3)
Therefore,
2x^2 + 8x - 3x - 12 = 0
2x(x - 4) - 3(x - 4) = 0
(x - 4)(2x - 3) = 0
x = 4, 3
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