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Why does every positive number have 2 square roots?
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Why does every positive number have 2 square roots?

User Pieter De Bie
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because they all have a negative and a positive part to it 
User Gober
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When you take the sqrt of 4 the answers are -2 and +2.
This is because if we take 2 square it, (2)^2, we get 4.
The same is true for -2.
(-2)^2 = 4 because -2 * -2 = +4

User Steve Severance
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