hs180806 hs180806

17-05-2017
Mathematics

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Why does every positive number have 2 square roots?

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IzzyandMak IzzyandMak

17-05-2017

because they all have a negative and a positive part to it

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17-05-2017

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

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