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Tohaina

xy\left(25x^{2}-81\right)
Tauwehea te xy.
\left(5x-9\right)\left(5x+9\right)
Whakaarohia te 25x^{2}-81. Tuhia anō te 25x^{2}-81 hei \left(5x\right)^{2}-9^{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).
xy\left(5x-9\right)\left(5x+9\right)
Me tuhi anō te kīanga whakatauwehe katoa.