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> 先化简,再求值:,其中x=+1,y=-1,-九年级数学
先化简,再求值:,其中x=+1,y=-1,-九年级数学
题目简介
先化简,再求值:,其中x=+1,y=-1,-九年级数学
题目详情
先化简,再求值:
,其中 x=
+1,y=
-1,
题型:计算题
难度:中档
来源: 期中题
答案
解:原式=
=2
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Though_____ money, his paren
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题目简介
先化简,再求值:,其中x=+1,y=-1,-九年级数学
题目详情
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