若有理数m,n满足|2m-1|+(n+2)^2=0,则mn的值等于( ).A.-1 B.1 C.-2 D.2

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若有理数m,n满足|2m-1|+(n+2)^2=0,则mn的值等于().A.-1B.1C.-2D.2若有理数m,n满足|2m-1|+(n+2)^2=0,则mn的值等于().A.-1B.1C.-2D.2

若有理数m,n满足|2m-1|+(n+2)^2=0,则mn的值等于( ).A.-1 B.1 C.-2 D.2
若有理数m,n满足|2m-1|+(n+2)^2=0,则mn的值等于( ).
A.-1 B.1 C.-2 D.2

若有理数m,n满足|2m-1|+(n+2)^2=0,则mn的值等于( ).A.-1 B.1 C.-2 D.2
|2m-1|+(n+2)^2=0
2m-1=0,n+2=0
m=1/2,n=-2
mn=1/2*(-2)=-1
选 A

A