关于公因式的!ab=7/10,a-b=1,求a^3b-2a^2b^2+ab^3

Question

关于公因式的!
ab=7/10,a-b=1,求a^3b-2a^2b^2+ab^3

Answer 1

a^3b-2a^2b^2+ab^3
=ab(a-b)^2
=7/10*1^2
=7/10