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> 下列等式中正确的是()A.(-0.1)-2=100B.2a-3=12a3C.yx=y2x2D.3-x-y=-3x-y-数学
下列等式中正确的是()A.(-0.1)-2=100B.2a-3=12a3C.yx=y2x2D.3-x-y=-3x-y-数学
题目简介
下列等式中正确的是()A.(-0.1)-2=100B.2a-3=12a3C.yx=y2x2D.3-x-y=-3x-y-数学
题目详情
下列等式中正确的是( )
A.(-0.1)
-2
=100
B.
2
a
-3
=
1
2
a
3
C.
y
x
=
y
2
x
2
D.
3
-x-y
=
-
3
x-y
题型:单选题
难度:偏易
来源:不详
答案
A、(-0.1)-2=100,故选项正确;
B、2a-3=
class="stub"2
a
3
,故选项错误;
C、分式中分子分母都平方,等式不成立,故选项错误;
D、变符号分子得(x+y),故选项错误.
故选A.
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题目简介
下列等式中正确的是()A.(-0.1)-2=100B.2a-3=12a3C.yx=y2x2D.3-x-y=-3x-y-数学
题目详情
答案
B、2a-3=
C、分式中分子分母都平方,等式不成立,故选项错误;
D、变符号分子得(x+y),故选项错误.
故选A.