Whakaoti mō a
a=4
Tautapa a
a≔4
Tohaina
Kua tāruatia ki te papatopenga
a=2\left(8+3\sqrt{2}\right)-3\left(4+\sqrt{8}\right)
Tauwehea te 18=3^{2}\times 2. Tuhia anō te pūtake rua o te hua \sqrt{3^{2}\times 2} hei hua o ngā pūtake rua \sqrt{3^{2}}\sqrt{2}. Tuhia te pūtakerua o te 3^{2}.
a=16+6\sqrt{2}-3\left(4+\sqrt{8}\right)
Whakamahia te āhuatanga tohatoha hei whakarea te 2 ki te 8+3\sqrt{2}.
a=16+6\sqrt{2}-3\left(4+2\sqrt{2}\right)
Tauwehea te 8=2^{2}\times 2. Tuhia anō te pūtake rua o te hua \sqrt{2^{2}\times 2} hei hua o ngā pūtake rua \sqrt{2^{2}}\sqrt{2}. Tuhia te pūtakerua o te 2^{2}.
a=16+6\sqrt{2}-12-6\sqrt{2}
Whakamahia te āhuatanga tohatoha hei whakarea te -3 ki te 4+2\sqrt{2}.
a=4+6\sqrt{2}-6\sqrt{2}
Tangohia te 12 i te 16, ka 4.
a=4
Pahekotia te 6\sqrt{2} me -6\sqrt{2}, ka 0.
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