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Tohaina

-3\times 3\sqrt{5}+3\sqrt{5}+2\sqrt{5}
Tauwehea te 45=3^{2}\times 5. Tuhia anō te pūtake rua o te hua \sqrt{3^{2}\times 5} hei hua o ngā pūtake rua \sqrt{3^{2}}\sqrt{5}. Tuhia te pūtakerua o te 3^{2}.
-9\sqrt{5}+3\sqrt{5}+2\sqrt{5}
Whakareatia te -3 ki te 3, ka -9.
-6\sqrt{5}+2\sqrt{5}
Pahekotia te -9\sqrt{5} me 3\sqrt{5}, ka -6\sqrt{5}.
-4\sqrt{5}
Pahekotia te -6\sqrt{5} me 2\sqrt{5}, ka -4\sqrt{5}.