若|m-3|+(n+2)^2=0,则m+2n的值为?
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若|m-3|+(n+2)^2=0,则m+2n的值为?
若|m-3|+(n+2)^2=0,则m+2n的值为?
若|m-3|+(n+2)^2=0,则m+2n的值为?
∵|m-3|+(n+2)^2=0
∴m-3=0 n+2=0
∴m=3 n=-2
∴m+2n=3-4=-1
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