问题
解答题
已知x+y=4,xy=1.5,求x3y+2x2y2+xy3的值.
答案
∵x+y=4,xy=1.5,
∴x3y+2x2y2+xy3,
=xy(x+y)2,
=16×1.5,
=24.
故答案为:24.
已知x+y=4,xy=1.5,求x3y+2x2y2+xy3的值.
∵x+y=4,xy=1.5,
∴x3y+2x2y2+xy3,
=xy(x+y)2,
=16×1.5,
=24.
故答案为:24.