Предмет: Алгебра, автор: Аноним

упростите выражение 5а⁹-3а⁷/4а⁸ и найдите его значение при а=-1

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Автор ответа: NNNLLL54

$a=-1\\\\\\\dfrac{5a^9-3a^7}{4a^8}=\dfrac{a^7\cdot (5a^2-3)}{4a^8}=\dfrac{5a^2-3}{4a}=\dfrac{5-3}{-4}=-\dfrac{2}{4}=-\dfrac{1}{2}$

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упростите выражение 5а⁹-3а⁷/4а⁸ и найдите его значение при а=-1​

Ответы

упростите выражение 5а⁹-3а⁷/4а⁸ и найдите его значение при а=-1