若x+y=5,xy=6,求x²y+xy²的值(1)若x+y=5,xy=6,求x²y+xy²的值 (2)计算3x²·2xy·xy²·3xy (3)计算-2(x-2y)³[-1/3﹙2y-x³﹚]

问题描述:

若x+y=5,xy=6,求x²y+xy²的值
(1)若x+y=5,xy=6,求x²y+xy²的值
(2)计算3x²·2xy·xy²·3xy
(3)计算-2(x-2y)³[-1/3﹙2y-x³﹚]