If every positive number has two square roots and you can find the length of the side of a square window by finding a square root of the area, why is there only one answer for the length of a side?

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asked Feb 26, 2015 32.8k views

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If every positive number has two square roots and you can find the length of the side of a square window by finding a square root of the area, why is there only one answer for the length of a side?

Mathematics
middle-school

Wirsing asked

by Wirsing

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One root is positive and the other is negative. There is no negative length :)

Garlapak answered Mar 4, 2015

by Garlapak

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