问题:
式子(m-2n-3)(m-2n+3)+9的算术平方根是
A.m-2n
B.2n-m
C.当m≥2n时,m-2n;当m<2n时,2n-m
D.当m≥2n时,2n-m;当m<2n时,m-2n
式子(m-2n-3)(m-2n+3)+9的算术平方根是
A.m-2n
B.2n-m
C.当m≥2n时,m-2n;当m<2n时,2n-m
D.当m≥2n时,2n-m;当m<2n时,m-2n
A.m-2n
B.2n-m
C.当m≥2n时,m-2n;当m<2n时,2n-m
D.当m≥2n时,2n-m;当m<2n时,m-2n
参考答案: