algebra : square root

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I remember my teacher saying something about you square root an answer like 121 the answer is -11 and +11

But, this also is not true for all the answers

Could someone tell me when I square root a number, when it is both a + and -, and when it is just a + .

  • algebra : square root -

    The square root of any number can be either positive or negative.

    When you multiply two negative numbers together, the answer is positive.

  • algebra : square root -

    Yes

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