已知x+y=5,xy=-3,则x^2y+xy^2,
问题描述:
已知x+y=5,xy=-3,则x^2y+xy^2,
答
x^2y+xy^2
=xy(x+y)
=(-3)×5
=-15
已知x+y=5,xy=-3,则x^2y+xy^2,
x^2y+xy^2
=xy(x+y)
=(-3)×5
=-15