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Ngā Raru Ōrite mai i te Rapu Tukutuku

Tohaina

\left(1-y\right)\left(1+y\right)
Tuhia anō te 1-y^{2} hei 1^{2}-y^{2}. Ka taea te rerekētanga o ngā pūrua te whakatauwehe mā te ture: a^{2}-b^{2}=\left(a-b\right)\left(a+b\right).
\left(-y+1\right)\left(y+1\right)
Whakaraupapatia anō ngā kīanga tau.