Предмет: Алгебра, автор: nrbrgn

Упростите выражение и найдите его значение при а=-1

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Автор ответа: belle2
0
(5a⁹-3a⁷)/4a⁸= a⁷(5a²-3)/4a⁸=(5a²-3)/4a
при а=-1
получается:
(5*(-1)²-3)/4(-1)=5-3/-4=-1/2=-0,5 
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