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Ngā Raru Ōrite mai i te Rapu Tukutuku

Tohaina

\left(a-n-d-c\right)\left(a-n+d+c\right)
Tuhia anō te a^{2}-d^{2}+n^{2}-c^{2}-2an-2cd hei \left(a-n\right)^{2}-\left(d+c\right)^{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(-n+a-c-d\right)\left(-n+a+c+d\right)
Whakaraupapatia anō ngā kīanga tau.