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July 28, 2014

July 28, 2014

Posted by **Wendy Q** on Monday, May 2, 2011 at 5:58pm.

why does the equation x^2 = 9 has two solutions

- Algebra Please Help -
**Holly**, Monday, November 7, 2011 at 3:41pmx^2=-9 has no real solution because when you square a number, it is always positive. There are never negative squares of numbers.

x^2=9 has two solutions because one solution is the given 3*3=9 and the other is -3*-3 because when you multiply two negative numbers they become positive.

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