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Tohaina

3\left(8-q^{3}\right)
Tauwehea te 3.
\left(q-2\right)\left(-q^{2}-2q-4\right)
Whakaarohia te 8-q^{3}. Tā te Rational Root Theorem, ko ngā pūtake whakahau katoa o tētahi pūrau kei te āhua o \frac{p}{q}, ina wehea e p te kīanga pūmau 8, ā, ka wehea e q te whakarea arahanga -1. Ko tetahi pūtake pērā ko 2. Tauwehea te pūrau mā te whakawehe mā te q-2.
3\left(q-2\right)\left(-q^{2}-2q-4\right)
Me tuhi anō te kīanga whakatauwehe katoa. Kāore te pūrau -q^{2}-2q-4 i whakatauwehea i te mea kāhore ōna pūtake whakahau.