Square Root Part 2

Discussion in 'Basic Math' started by nycmathguy, Jul 21, 2021.

  1. nycmathguy

    nycmathguy

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    Why do we get a positive and negative answer when taking the square root of a number?

    Sample:

    sqrt{81} = - 9 and 9.

    Why?
     
    nycmathguy, Jul 21, 2021
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  2. nycmathguy

    MathLover1

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    because (-9)^2=81 and (9)^2=81
     
    MathLover1, Jul 21, 2021
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    nycmathguy likes this.
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  3. nycmathguy

    nycmathguy

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    I see. Any number squared yields a positive answer.
     
    nycmathguy, Jul 21, 2021
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