December 2018 0 15 Report
Liczba  \frac{2 \sqrt{2} -1 }{1+2 \sqrt{2} } jest równa:

A.  \frac{4 \sqrt{2} -9}{7}

B.  \frac{9-4 \sqrt{2} }{7}

C. \frac{9-4 \sqrt{2} }{-7}

D.1
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