先化简再求值(a-2ab-b²/a)乘以a²+ab/a²-b²其中a=1,-3小于b小于负根号三且b为整数
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先化简再求值(a-2ab-b²/a)乘以a²+ab/a²-b²其中a=1,-3小于b小于负根号三且b为整数
先化简再求值(a-2ab-b²/a)乘以a²+ab/a²-b²其中a=1,-3小于b小于负根号三且b为整数
先化简再求值(a-2ab-b²/a)乘以a²+ab/a²-b²其中a=1,-3小于b小于负根号三且b为整数
a=1,
-3小于b小于负根号三且b为整数,b=-2
(a-2ab-b²)/a乘以(a²+ab)/(a²-b²)
=(a-2ab-b²/a乘以a(a+b)/[(a+b)(a-b)]
=(a-2ab-b²)/(a-b)
=(1-2b-b²)/(1-b)
=(1+4-4)/(1+2)
=1/3