# Algebra/Square Root is Positive

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## Square Root Is Not Negative[edit]

We often say that is the positive number, which when squared is equal to . If this is perfectly correct, but if then which is not positive. So to be technically correct (which is part of the fun of math) we should say that is the **non-negative** number, which when squared is equal to .

If it is needed to express that a square root may be both positive and negative, you will see .