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3\left(x^{2}y^{2}-4x^{2}\right)
Tauwehea te 3.
x^{2}\left(y^{2}-4\right)
Whakaarohia te x^{2}y^{2}-4x^{2}. Tauwehea te x^{2}.
\left(y-2\right)\left(y+2\right)
Whakaarohia te y^{2}-4. Tuhia anō te y^{2}-4 hei y^{2}-2^{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).
3x^{2}\left(y-2\right)\left(y+2\right)
Me tuhi anō te kīanga whakatauwehe katoa.