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Ngā Raru Ōrite mai i te Rapu Tukutuku

Tohaina

a\left(a^{2}-9\right)+a^{2}-9
Mahia te whakarōpūtanga a^{3}-9a+a^{2}-9=\left(a^{3}-9a\right)+\left(a^{2}-9\right), ka whakatauwehea atu a i te a^{3}-9a.
\left(a^{2}-9\right)\left(a+1\right)
Whakatauwehea atu te kīanga pātahi a^{2}-9 mā te whakamahi i te āhuatanga tātai tohatoha.
\left(a-3\right)\left(a+3\right)
Whakaarohia te a^{2}-9. Tuhia anō te a^{2}-9 hei a^{2}-3^{2}. Ka taea te rerekētanga o ngā pūrua te whakatauwehe mā te ture: p^{2}-q^{2}=\left(p-q\right)\left(p+q\right).
\left(a-3\right)\left(a+1\right)\left(a+3\right)
Me tuhi anō te kīanga whakatauwehe katoa.