当x+y=5 xy=6 (x2y)(xy2)=?谁能帮我算算?
问题描述:
当x+y=5 xy=6 (x2y)(xy2)=?
谁能帮我算算?
答
322*322?
223*232?
xy=6,(6*2)*(6*2)=
答
当x+y=5 xy=6
x=3
y=2
或
x=3
y=2
(x2y)(xy2)=216
答
(x2y)(xy2)
=xy*xy*xy
=6*6*6
=216
楼主是不是抄错题了?
(x2y)+(xy2)
=xy(x+y)
=5*6
=30