Aromātai
\left(x+2y\right)^{2}-4
Whakaroha
x^{2}+4xy+4y^{2}-4
Tohaina
Kua tāruatia ki te papatopenga
\left(x+2y\right)^{2}-2^{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}, ina a=x+2y me b=2.
x^{2}+4xy+4y^{2}-2^{2}
Whakamahia te ture huarua \left(a+b\right)^{2}=a^{2}+2ab+b^{2} hei whakaroha \left(x+2y\right)^{2}.
x^{2}+4xy+4y^{2}-4
Tātaihia te 2 mā te pū o 2, kia riro ko 4.
\left(x+2y\right)^{2}-2^{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}, ina a=x+2y me b=2.
x^{2}+4xy+4y^{2}-2^{2}
Whakamahia te ture huarua \left(a+b\right)^{2}=a^{2}+2ab+b^{2} hei whakaroha \left(x+2y\right)^{2}.
x^{2}+4xy+4y^{2}-4
Tātaihia te 2 mā te pū o 2, kia riro ko 4.
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