Simplify 2/sqrt(5)

Discussion in 'Calculator Requests' started by math_celebrity, Dec 24, 2023.

  1. math_celebrity

    math_celebrity Administrator Staff Member

    To do this, we need rationalize the denominator. This means get rid of the radical:

    Multiply top and bottom by sqrt(5)
    2sqrt(5)/sqrt(5) * sqrt(5)

    sqrt(5) * sqrt(5) = sqrt(25) so we have:

    sqrt(25) = 5, so we have:


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