|m-3|+(n+2)²=0
|m-3|=0,(n+2)²=0
m-3=0,n+2=0
m=3
n=-2
m+2n
=3+2*(-2)
=3-4
=-1
若實數(shù)m,n滿足|m-3|+(n+2)2=0,則m+2n的值為多少
若實數(shù)m,n滿足|m-3|+(n+2)2=0,則m+2n的值為多少
數(shù)學人氣：504 ℃時間：2020-05-30 20:28:51
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