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Taking the equation to be y=ax2 + bx +c , and using the formula x = -b plus/minus sqrt (b2-4ac), all over 2a: x = (-3+21)/12 or (-3-21)/12 so x = 1.5 or -2

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Q: Solve 6x2 plus 3x -18 equals 0 using quadratic formula?
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