先化简再求值 (a方-2a分之a+2-a方-4a+4分之a-1)除以a-2分之a-4
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解:
((a+2)/(a²+2a)-(a-1)/(a²-4a+4))/(a-4/a-2)
=((a+2)/(a²+2a)-(a-1)/(a-2)²)*(a-2)/(a-4)
=(1/a-(a-1)/(a-2)²)*(a-2)/(a-4)
=((a-2)/a-(a-1)/(a-2))/(a-4)
=((a²-4a+4)-(a²-a))/a(a-2)(a-4)
=(-3a+4)/a(a-2)(a-4)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
祝你学习进步,更上一层楼!
不明白请及时追问,满意敬请采纳,O(∩_∩)O谢谢~~
((a+2)/(a²+2a)-(a-1)/(a²-4a+4))/(a-4/a-2)
=((a+2)/(a²+2a)-(a-1)/(a-2)²)*(a-2)/(a-4)
=(1/a-(a-1)/(a-2)²)*(a-2)/(a-4)
=((a-2)/a-(a-1)/(a-2))/(a-4)
=((a²-4a+4)-(a²-a))/a(a-2)(a-4)
=(-3a+4)/a(a-2)(a-4)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
祝你学习进步,更上一层楼!
不明白请及时追问,满意敬请采纳,O(∩_∩)O谢谢~~
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