已知x+y=1,xy=3/16,求x³y-2x²y²+xy³

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/11 02:59:20
已知x+y=1,xy=3/16,求x³y-2x²y²+xy³

已知x+y=1,xy=3/16,求x³y-2x²y²+xy³
已知x+y=1,xy=3/16,求x³y-2x²y²+xy³

已知x+y=1,xy=3/16,求x³y-2x²y²+xy³
x³y-2x²y²+xy³
=xy(x²-2xy+y²)
=xy[(x+y)²-4xy]
=3/16*(1²-4*3/16)
=3/64