a^3-b^3
=a^3+a^2b-a^2b+ab^2-ab^2-b^3
=(a-b)a^2+(a-b)ab+(a-b)b^2
=(a-b)(a^2+ab+b^2)
a的三次-b的三次怎么因式分解?
0
0
2个回答
-
00
更多回答
a^3-b^3
=a^3+a^2b-a^2b+ab^2-ab^2-b^3
=(a-b)a^2+(a-b)ab+(a-b)b^2
=(a-b)(a^2+ab+b^2)