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August 20, 2014

August 20, 2014

Posted by **BERNIE** on Saturday, August 18, 2012 at 9:36am.

- algebra2 -
**Reiny**, Saturday, August 18, 2012 at 9:54amx^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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