你的原式应该是(x+y)(x-y)(x²-xy+y²)(x²+xy+y²)
原式=[(x-y)(x²+xy+y²)][(x+y)(x²-xy+y²)](乘法交换律)
=(x³-y³)(x³+y³)(乘方定律)
=(x³)²-(y³)²(逆用平方差公式)
=x的六次方-y的六次方(即x^6-y^6 )
解:
原式=[(x-y)(x²+xy+y²)][(x+y)(x²-xy+y²)]
=(x³-y³)(x³+y³)
=(x³)²-(y³)²
=x^6-y^6 ( ^ 表示乘方)