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2\sqrt{4000000\times 120}
Whakareatia te 4000 ki te 1000, ka 4000000.
2\sqrt{480000000}
Whakareatia te 4000000 ki te 120, ka 480000000.
2\times 4000\sqrt{30}
Tauwehea te 480000000=4000^{2}\times 30. Tuhia anō te pūtake rua o te hua \sqrt{4000^{2}\times 30} hei hua o ngā pūtake rua \sqrt{4000^{2}}\sqrt{30}. Tuhia te pūtakerua o te 4000^{2}.
8000\sqrt{30}
Whakareatia te 2 ki te 4000, ka 8000.