Question 671147
{{{(-x)^2 = 12 + 4(-x)}}}
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{{{-x^2}}} will give a positive number so,
{{{x^2 = 12 - 4x}}}
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{{{x^2 + 4x - 12 = 0}}}
(x-2)(x+6)
x = 2
x = -6
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Check
2^2 = 12 + 4(-2)
4 = 12 - 8 : Correct
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-6^2 = 12 + 4(-(-6))
36 = 12 + 24 = 36: Correct
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