Aromātai
\frac{\sqrt{7}}{21}\approx 0.125988158
Tohaina
Kua tāruatia ki te papatopenga
\frac{1}{2\sqrt{7}+\sqrt{7}}
Tauwehea te 28=2^{2}\times 7. Tuhia anō te pūtake rua o te hua \sqrt{2^{2}\times 7} hei hua o ngā pūtake rua \sqrt{2^{2}}\sqrt{7}. Tuhia te pūtakerua o te 2^{2}.
\frac{1}{3\sqrt{7}}
Pahekotia te 2\sqrt{7} me \sqrt{7}, ka 3\sqrt{7}.
\frac{\sqrt{7}}{3\left(\sqrt{7}\right)^{2}}
Whakangāwaritia te tauraro o \frac{1}{3\sqrt{7}} mā te whakarea i te taurunga me te tauraro ki te \sqrt{7}.
\frac{\sqrt{7}}{3\times 7}
Ko te pūrua o \sqrt{7} ko 7.
\frac{\sqrt{7}}{21}
Whakareatia te 3 ki te 7, ka 21.
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