已知a+b=3,ab=2,求a^2b+ab^2 和 a^2+b^2

2024-12-16 12:00:52
推荐回答(2个)
回答1:

a^2b+ab^2
=ab(a+b)
=3*2
=6

a^2+b^2
=(a+b)^2-2ab
=9-4
=5

回答2:

a^2b+ab^2
=ab(a+b)
=2*3
=6
a^2+b^2
=(a+b)^2-2ab
=3^2-2*2
=5