a的六次方+b的六次方+2a的立方乘2b的立方!

1个回答

a^6+b^6+2a³×b³
=(a³)²+2a³b³+(b³)²
=(a³+b³)²
=[(a+b)(a²-ab+b²)]²
=(a+b)²(a²-ab+b²)²