下列各式计算结果正确的是( ) A.x+x=x2 B.(2x)2=4x C.(x 发布时间:2017-04-28 06:39 │ 来源:www.tikuol.com 题型:选择题 问题: 下列各式计算结果正确的是( )A.x+x=x2B.(2x)2=4xC.(x+1)2=x2+1D.x•x=x2
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