|3x+y|-(y-6)²=0计算2x²y-(3xy-5x²y)+4xy已知|3x+y|-(y-6)²=0计算2x²y-(3xy-5x²y)+4xy

|3x+y|-(y-6)²=0计算2x²y-(3xy-5x²y)+4xy已知|3x+y|-(y-6)²=0计算2x²y-(3xy-5x²y)+4xy
|3x+y|-(y-6)²=0计算2x²y-(3xy-5x²y)+4xy
已知|3x+y|-(y-6)²=0计算2x²y-(3xy-5x²y)+4xy

|3x+y|-(y-6)²=0计算2x²y-(3xy-5x²y)+4xy已知|3x+y|-(y-6)²=0计算2x²y-(3xy-5x²y)+4xy
|3x+y|-(y-6)²=0,则有
3x+y=0
y-6=0
解得
x=-2
y=6
2x²y-(3xy-5x²y)+4xy
=7x²y+xy
=xy（7x+1）
=-2×6×（7×（-2）+1）
=12×13
=156

|3x+y|+(y-6)²=0
|3x+y|>=0,(y-6)²>=0
3x+y=0
y-6=0
x=-2,y=6
2x²y-(3xy-5x²y)+4xy
=xy(7x+1)
=(-12)×(-13)
=156