a的立方-b的立方分解因式

Question

谢谢

Answer 1

原式=a³-a²b+a²b-ab²+ab²-b³
=a²(a-b)+ab(a-b)+b²(a-b)
=(a-b)(a²+ab+b²)

Answer 2

a^3-b^3
=(a-b)(a^2+ab+b^2)

Answer 3

a³－b³=﹙a－b﹚﹙a²＋ab＋b²﹚

Answer 4

(a-b)(a^2+ab+b^2)