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Tohaina

a^{3}+2ba^{2}-6b^{2}a-27b^{3}
Whakaarohia te a^{3}-27b^{3}+2a^{2}b-6ab^{2} hei pūrau ki runga i te taurangi a.
\left(a-3b\right)\left(a^{2}+5ab+9b^{2}\right)
Kimihia he tauwehe o te āhua a^{k}+m, e wehea ai e a^{k} te huatahi me te pū nui rawa a^{3}, e wehea hoki e m te tauwehe pūmau -27b^{3}. Ko tētahi tauwehe pērā ko a-3b. Whakatauwehea te pūrau mā te whakawehe ki tēnei tauwehe.