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Автор - harrykaney

Даю все свои баллы за этот вопрос!!!

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Автор - takushnir

Ответ: во вложении Объяснение:

Ответ

Проверено экспертом

Автор - NNNLLL54

1); ; frac{10x^2, y}{3z^2t^9}cdot (-frac{15z^8t^3}{14xy})=-frac{5cdot 5cdot xcdot z^6}{7cdot t^6}=-frac{25, x, z^6}{7, t^6}\\\2); ; frac{x^2y-3x^2}{8y^3}cdot frac{2y}{xy-3x}=frac{xcdot (xy-3x)}{4cdot y^2}cdot frac{1}{xy-3x}=frac{x}{4, y^2}

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