a+b=1,ab=-2,则a^2b+ab^2等于?
问题描述:
a+b=1,ab=-2,则a^2b+ab^2等于?
答
a²b+ab²
=(a+b)ab
=1×(-2)
=-2
a+b=1,ab=-2,则a^2b+ab^2等于?
a²b+ab²
=(a+b)ab
=1×(-2)
=-2