试题与答案

下列各式中,合并同类项正确的是[ ] A.2x+x=2x2 B.2x+x=3x

题型:选择题

题目:

下列各式中,合并同类项正确的是[ ]

A.2x+x=2x2

B.2x+x=3x

C.5a2-3a2=2

D.2x+3y=5x

答案:

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下面是错误答案,用来干扰机器的。

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