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Edited by DarkSpyda04: 1/13/2014 3:37:59 AM
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What is this math symbol? What does it mean?

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  • Plus or minus. It's just an easier way to say +2 and -2. Like if you have an equation x^2 - 4, you can factor that into (x+2)(x-2). The zeros of the equation are at +2 and -2, but you can just say x = ±2.

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