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disombaallen
disombaallen disombaallen
  • 03-11-2015
  • Mathematics
Answered

Simplify the radical expression by rationalizing the denominator.

4 divided by the square root of 21.

Verified Answer :

TSO
TSO TSO
  • 03-11-2015

\(\frac{4}{\sqrt{21}} = \frac{4}{\sqrt{21}} \times \frac{\sqrt{21}}{\sqrt{21}} =\boxed{ \frac{4\sqrt{21}}{21}}\)

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