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Ngā Raru Ōrite mai i te Rapu Tukutuku

Tohaina

\left(\sqrt{5}\right)^{2}-1^{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}.
5-1^{2}
Ko te pūrua o \sqrt{5} ko 5.
5-1
Tātaihia te 1 mā te pū o 2, kia riro ko 1.
4
Tangohia te 1 i te 5, ka 4.