计算下列各式:
(1)(a+b)(a2-ab+b2)=______;
(2)(a-b)(a2+ab+b2)=______;
应用上述结论填空:
(1)(a+2b)(______)=a3+(2b)3=______;
(2)(3x-1)(______)=(3x)3-13=______;
请用你找到的方法分解因式:
(1)=______;
(2)x6-y6=______.
网友回答
解:计算下列各式:
(1)(a+b)(a2-ab+b2)=a3-a2b+ab2+a2b-ab2+b3=a3+b3;
(2)(a-b)(a2+ab+b2)=a3+a2b+ab2-a2b-ab2-b3=a3-b3;
故