Square Root Part 1

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

  1. nycmathguy

    nycmathguy

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    How can I simply sqrt{4.9} without a calculator?
     
    nycmathguy, Jul 21, 2021
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  2. nycmathguy

    MathLover1

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    you can't do that one without a calculator
     
    MathLover1, Jul 21, 2021
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    nycmathguy likes this.
  3. nycmathguy

    nycmathguy

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    I'm sure there is a way but may required advanced skills that I don't have.
     
    nycmathguy, Jul 21, 2021
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  4. nycmathguy

    HallsofIvy

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    4.9= 49/10 so sqrt(4.9)= sqrt(49/10)= 7/sqrt(10). If you like you can "rationalize the denominator" by multiplying both numerator and denominator by sqrt(10): sqrt(4.9)= 7sqrt(10)/10. Is that "simpler"?
     
    HallsofIvy, Nov 27, 2021
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  5. nycmathguy

    nycmathguy

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    That works for me. Thanks.
     
    nycmathguy, Nov 27, 2021
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