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729a^{3}-1215a^{2}+675a-125
Usar teorema binomial \left(p-q\right)^{3}=p^{3}-3p^{2}q+3pq^{2}-q^{3} para expandir \left(9a-5\right)^{3}.
729a^{3}-1215a^{2}+675a-125
Usar teorema binomial \left(p-q\right)^{3}=p^{3}-3p^{2}q+3pq^{2}-q^{3} para expandir \left(9a-5\right)^{3}.