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harley0511 harley0511
  • 22-01-2017
  • Mathematics
Answered

which expression is equal to 9 divided by 3 minus the square root of 2

Verified Answer :

kaevras
kaevras kaevras
  • 22-01-2017

\(\frac{9}{3- \sqrt{2} }\)

You can rationalise this by multiplying the numerator and denominator by the denominator (inverse the sign).

\(\frac{9}{3- \sqrt{2} } * \frac{3+ \sqrt{2}}{3+ \sqrt{2}} = \frac{27+9 \sqrt{2}}{7}\)


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