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}

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]

A system which has no solution and whose graph consists of parallel lines is called: **Weegy:** A system which has no solution and whose graph consists of parallel lines is called inconsistent system. (More)

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Updated 8/18/2014 4:22:19 PM

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Solve for x: x2 + 3x – 10 = 0 **Weegy:**
x^2 + 3x – 10 = 0;
(x + 5)(x - 2) = 0;
x + 5 = 0; x = -5;
x - 2 = 0; x = 2;
x = 2 or -5 (More)

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Updated 8/18/2014 4:20:10 PM

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