(a²-b²)(a²+ab+b²)(a²-ab+b²)计算(a+1)(a²-a+1)=a³+1(a-2)(a²+2a+4)=a³-8
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(a²-b²)(a²+ab+b²)(a²-ab+b²)计算(a+1)(a²-a+1)=a³+1(a-2)(a²+2a+4)=a³-8
(a²-b²)(a²+ab+b²)(a²-ab+b²)计算
(a+1)(a²-a+1)=a³+1
(a-2)(a²+2a+4)=a³-8
(a²-b²)(a²+ab+b²)(a²-ab+b²)计算(a+1)(a²-a+1)=a³+1(a-2)(a²+2a+4)=a³-8
(a²-b²)(a²+ab+b²)(a²-ab+b²)
=(a-b)(a+b)(a²+ab+b²)(a²-ab+b²)
=(a³-b³)(a³+b³)
=a^6-b^6
(a+1)(a²-a+1)=a³+1
(a-2)(a²+2a+4)=a³-8
这两个要怎么解答?