已知a+b=5,ab=3,求代数式a^3b+2a^2b^2+ab^3,谢谢

2025-06-27 14:33:00
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回答1:

a+b=5,ab=3,
a^3b+2a^2b^2+ab^3
=ab(a²+2ab+b²)
=ab(a+b)²
=3×5²
=75