已知丨m-2丨+(n+5/1)²=0,求m-(m²n+3m-4n)+3(2nm²-3n)的值

已知丨m-2丨+(n+5/1)²=0,求m-(m²n+3m-4n)+3(2nm²-3n)的值
已知丨m-2丨+(n+5/1)²=0,求m-(m²n+3m-4n)+3(2nm²-3n)的值

已知丨m-2丨+(n+5/1)²=0,求m-(m²n+3m-4n)+3(2nm²-3n)的值
已知丨m-2丨+(n+1/5)²=0,求m-(m²n+3m-4n)+3(2nm²-3n)的值
∵丨m-2丨+(n+5/1)²=0
∴m-2=0 m=2
n+1/5=0 n=-1/5
m-(m²n+3m-4n)+3(2nm²-3n)
=m-m²n-3m+4n+6nm²-9n
=-2m-5n+5m²n
∵m=2,n=-1/5
∴-2m-5n+5m²n
=-5n
=-5*﹙-1/5﹚
=1