若/m-3/+(n+2)*(n+2)=0,则m+2n=?

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若/m-3/+(n+2)*(n+2)=0,则m+2n=?若/m-3/+(n+2)*(n+2)=0,则m+2n=?若/m-3/+(n+2)*(n+2)=0,则m+2n=?M=3.N=-2.答案-1绝对值

若/m-3/+(n+2)*(n+2)=0,则m+2n=?
若/m-3/+(n+2)*(n+2)=0,则m+2n=?

若/m-3/+(n+2)*(n+2)=0,则m+2n=?
M=3.N=-2.答案 -1

绝对值和平方项非0 但题目等于0 只能说明 那两项等于0
所以m=3,n=-2
m+2n=3+2*(-2)=-1