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> 计算与化简(1)(2)先化简,再求值:,其中2-八年级数学
计算与化简(1)(2)先化简,再求值:,其中2-八年级数学
题目简介
计算与化简(1)(2)先化简,再求值:,其中2-八年级数学
题目详情
计算与化简
(1)
(2)先化简,再求值:
,其中
2
题型:计算题
难度:中档
来源:山东省期末题
答案
解:(1)=
=
=
(2)解:原式=
2时,原式=
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题目简介
计算与化简(1)(2)先化简,再求值:,其中2-八年级数学
题目详情
(1)
(2)先化简,再求值:
答案
=
=
(2)解:原式=