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Tohaina

\left(1.7x\right)^{2}-\left(2y\right)^{2}
Ka taea te whakareanga te panoni ki te rerekētanga o ngā pūrua mā te ture: \left(a-b\right)\left(a+b\right)=a^{2}-b^{2}.
1.7^{2}x^{2}-\left(2y\right)^{2}
Whakarohaina te \left(1.7x\right)^{2}.
2.89x^{2}-\left(2y\right)^{2}
Tātaihia te 1.7 mā te pū o 2, kia riro ko 2.89.
2.89x^{2}-2^{2}y^{2}
Whakarohaina te \left(2y\right)^{2}.
2.89x^{2}-4y^{2}
Tātaihia te 2 mā te pū o 2, kia riro ko 4.
\left(1.7x\right)^{2}-\left(2y\right)^{2}
Ka taea te whakareanga te panoni ki te rerekētanga o ngā pūrua mā te ture: \left(a-b\right)\left(a+b\right)=a^{2}-b^{2}.
1.7^{2}x^{2}-\left(2y\right)^{2}
Whakarohaina te \left(1.7x\right)^{2}.
2.89x^{2}-\left(2y\right)^{2}
Tātaihia te 1.7 mā te pū o 2, kia riro ko 2.89.
2.89x^{2}-2^{2}y^{2}
Whakarohaina te \left(2y\right)^{2}.
2.89x^{2}-4y^{2}
Tātaihia te 2 mā te pū o 2, kia riro ko 4.