若(5x+M)²=25x²-10xy+N,则M=,N=.
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若(5x+M)²=25x²-10xy+N,则M=,N=.
若(5x+M)²=25x²-10xy+N,则M=,N=.
若(5x+M)²=25x²-10xy+N,则M=,N=.
(5x+M)²
=25x²-10Mxy+M²
=25x²-10xy+N
对影响系数相等
-10M=10
M=1
N=M²=1
则M=1,N=1