rationalize the denominator | MathCelebrity Forum

rationalize the denominator

  1. math_celebrity

    Simplify 2/sqrt(5)

    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: 2sqrt(5)/sqrt(25) sqrt(25) = 5, so we have: 2sqrt(5)/5
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