如果m,n为有理数,且满足/m+n+2/+(m-2n+8)²=0,则mn=
问题描述:
如果m,n为有理数,且满足/m+n+2/+(m-2n+8)²=0,则mn=
答
/m+n+2/+(m-2n+8)²=0
m+n+2=0
m-2n+8=0
解得
m=-4
n=2
mn=-4x2=-8