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Whakaoti mō y
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Whakaoti mō x
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Tohaina

y=x^{3}-9x^{2}+27x-27
Whakamahia te ture huarua \left(a-b\right)^{3}=a^{3}-3a^{2}b+3ab^{2}-b^{3} hei whakaroha \left(x-3\right)^{3}.