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\left(-\frac{2}{7}x\right)^{2}-\left(\frac{5}{3}\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}.
\left(-\frac{2}{7}\right)^{2}x^{2}-\left(\frac{5}{3}\right)^{2}
Whakarohaina te \left(-\frac{2}{7}x\right)^{2}.
\frac{4}{49}x^{2}-\left(\frac{5}{3}\right)^{2}
Tātaihia te -\frac{2}{7} mā te pū o 2, kia riro ko \frac{4}{49}.
\frac{4}{49}x^{2}-\frac{25}{9}
Tātaihia te \frac{5}{3} mā te pū o 2, kia riro ko \frac{25}{9}.
\left(-\frac{2}{7}x\right)^{2}-\left(\frac{5}{3}\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}.
\left(-\frac{2}{7}\right)^{2}x^{2}-\left(\frac{5}{3}\right)^{2}
Whakarohaina te \left(-\frac{2}{7}x\right)^{2}.
\frac{4}{49}x^{2}-\left(\frac{5}{3}\right)^{2}
Tātaihia te -\frac{2}{7} mā te pū o 2, kia riro ko \frac{4}{49}.
\frac{4}{49}x^{2}-\frac{25}{9}
Tātaihia te \frac{5}{3} mā te pū o 2, kia riro ko \frac{25}{9}.