已知Ix+2I+（y+3）²=0求6xy²-【3x²y-（2x²y-xy²）】的值

已知Ix+2I+（y+3）²=0求6xy²-【3x²y-（2x²y-xy²）】的值
已知Ix+2I+（y+3）²=0求6xy²-【3x²y-（2x²y-xy²）】的值

已知Ix+2I+（y+3）²=0求6xy²-【3x²y-（2x²y-xy²）】的值
Ix+2I+（y+3）²=0
Ix+2I>=0,（y+3）²>=0
x+2=0
y+3=0
x=-2,y=-3
6xy²-【3x²y-（2x²y-xy²）】
=6xy²-3x²y+（2x²y-xy²）
=6xy²-3x²y+2x²y-xy²
=5xy²-x²y
=xy(5y-x)
=-2*(-3)*(-15+2)
=-78