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Espandi
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Sehem

81m^{2}-54mn+9n^{2}
Uża teorema binomjali \left(a-b\right)^{2}=a^{2}-2ab+b^{2} biex tespandi \left(9m-3n\right)^{2}.
81m^{2}-54mn+9n^{2}
Uża teorema binomjali \left(a-b\right)^{2}=a^{2}-2ab+b^{2} biex tespandi \left(9m-3n\right)^{2}.