6x² - 17x +12 =
X = (-b +/- (square root of b² - 4ac)) divided by 2a
X = (--17 +/- square root of 289-288)) divided by 12
X = 1.5 or 1.333333 recurring
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You can factor it, if you consider that simpler.
It is: 4(x+3)
There is no factor of the expression in the question.
(x+7)(x+12)
=3x * * * * * The correct answer is: x2 + 7x + 12 = (x + 3)(x + 4).