Aromātai
5\sqrt{2}-4\approx 3.071067812
Tohaina
Kua tāruatia ki te papatopenga
\frac{10-4\sqrt{2}}{\sqrt{2}}
Tauwehea te 32=4^{2}\times 2. Tuhia anō te pūtake rua o te hua \sqrt{4^{2}\times 2} hei hua o ngā pūtake rua \sqrt{4^{2}}\sqrt{2}. Tuhia te pūtakerua o te 4^{2}.
\frac{\left(10-4\sqrt{2}\right)\sqrt{2}}{\left(\sqrt{2}\right)^{2}}
Whakangāwaritia te tauraro o \frac{10-4\sqrt{2}}{\sqrt{2}} mā te whakarea i te taurunga me te tauraro ki te \sqrt{2}.
\frac{\left(10-4\sqrt{2}\right)\sqrt{2}}{2}
Ko te pūrua o \sqrt{2} ko 2.
\frac{10\sqrt{2}-4\left(\sqrt{2}\right)^{2}}{2}
Whakamahia te āhuatanga tohatoha hei whakarea te 10-4\sqrt{2} ki te \sqrt{2}.
\frac{10\sqrt{2}-4\times 2}{2}
Ko te pūrua o \sqrt{2} ko 2.
\frac{10\sqrt{2}-8}{2}
Whakareatia te -4 ki te 2, ka -8.
5\sqrt{2}-4
Whakawehea ia wā o 10\sqrt{2}-8 ki te 2, kia riro ko 5\sqrt{2}-4.
Ngā Tauira
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{ x } ^ { 2 } - 4 x - 5 = 0
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