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posted by David Thursday, December 13, 2012 at 12:30pm.
X^2 x+2=82, x^2+2x=82
typo in the first ... in 2nd: x^2 + 2x - 82 = 0 x = (-2 ± √(4 -4(1)(-82))/2 = (-2 ± √332)/2 = (-2 ± 2√83)/2 = -1 ± √83
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