Posted by BERNIE on Saturday, August 18, 2012 at 9:36am.
x^2 + 18x = -4
take half of the 18, square it, then add to both sides
x^2 + 18x + 81 =-4 + 81
(x+9)^2 = 77
x+9 = ±√77
x = -9 ± √77
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