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Ngā Raru Ōrite mai i te Rapu Tukutuku

Tohaina

4^{2}-\left(7y\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}.
16-\left(7y\right)^{2}
Tātaihia te 4 mā te pū o 2, kia riro ko 16.
16-7^{2}y^{2}
Whakarohaina te \left(7y\right)^{2}.
16-49y^{2}
Tātaihia te 7 mā te pū o 2, kia riro ko 49.
4^{2}-\left(7y\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}.
16-\left(7y\right)^{2}
Tātaihia te 4 mā te pū o 2, kia riro ko 16.
16-7^{2}y^{2}
Whakarohaina te \left(7y\right)^{2}.
16-49y^{2}
Tātaihia te 7 mā te pū o 2, kia riro ko 49.