a方+a/a方-1 8a方+16a+8/4a+4

yzw_842022-10-04 11:39:541条回答

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jjeng 共回答了24个问题 | 采纳率91.7%
(a²+a)/(a²-1)
=a(a+1)/(a+1)(a-1)
=a/(a-1)
(8a²+16a+8)/(4a+4)
=8(a+1)²/4(a+1)
=2(a+1)
1年前

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