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3x^2 – 27 = 0 solve for x
x can be either positive or negative 3
Expert answered|theresearcher|Points 1827|
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Asked 9/26/2010 6:44:47 AM
Updated 8/2/2014 6:17:17 PM
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3x^2 – 27 = 0

3(x - 3) (x + 3) = 0;

3(x - 3) = 0;
3x - 9 = 0;
3x = 9;
x = 9/3;
x = 3

x + 3 = 0;
x = -3

x = {-3, 3}
Added 8/2/2014 6:17:17 PM
This answer has been confirmed as correct and helpful.
Confirmed by yumdrea [8/2/2014 6:29:40 PM]
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