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Ngā Raru Ōrite mai i te Rapu Tukutuku

Tohaina

\left(\sqrt{18}\right)^{2}-\left(\sqrt{2}\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}.
18-\left(\sqrt{2}\right)^{2}
Ko te pūrua o \sqrt{18} ko 18.
18-2
Ko te pūrua o \sqrt{2} ko 2.
16
Tangohia te 2 i te 18, ka 16.