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Tohaina

\left(\frac{3}{4}\right)^{2}-\left(4y\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}.
\frac{9}{16}-\left(4y\right)^{2}
Tātaihia te \frac{3}{4} mā te pū o 2, kia riro ko \frac{9}{16}.
\frac{9}{16}-4^{2}y^{2}
Whakarohaina te \left(4y\right)^{2}.
\frac{9}{16}-16y^{2}
Tātaihia te 4 mā te pū o 2, kia riro ko 16.
\left(\frac{3}{4}\right)^{2}-\left(4y\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}.
\frac{9}{16}-\left(4y\right)^{2}
Tātaihia te \frac{3}{4} mā te pū o 2, kia riro ko \frac{9}{16}.
\frac{9}{16}-4^{2}y^{2}
Whakarohaina te \left(4y\right)^{2}.
\frac{9}{16}-16y^{2}
Tātaihia te 4 mā te pū o 2, kia riro ko 16.