Respuesta:
125x^3-525x^2+735x-343
Explicación paso a paso:
\mathrm{Aplicar\:la\:fórmula\:del\:binomio\:al\:cubo}:\quad \left(a-b\right)^3=a^3-3a^2b+3ab^2-b^3
\left(5x\right)^3-3\left(5x\right)^2\cdot \:7+3\cdot \:5x\cdot \:7^2-7^3
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Respuesta:
125x^3-525x^2+735x-343
Explicación paso a paso:
\mathrm{Aplicar\:la\:fórmula\:del\:binomio\:al\:cubo}:\quad \left(a-b\right)^3=a^3-3a^2b+3ab^2-b^3
\left(5x\right)^3-3\left(5x\right)^2\cdot \:7+3\cdot \:5x\cdot \:7^2-7^3