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2x2 + 6x - 8 = 72

∴ 2x2 + 6x + 64 =0

∴ x2 + 3x + 32 = 0

This can not be factored, as x is not equal to any integer. Using the quadratic equation, we find that:

x = -3/2 ± √119 / 2i

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15y ago

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