题目内容
【题目】计算:(x-y)(x2+xy+y2)=__________
【答案】x3-y3
【解析】(x-y)(x2+xy+y2)=x3+x2y+xy2-x2y-xy2-y3=x3-y3,
故答案为:x3-y3.
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题目内容
【题目】计算:(x-y)(x2+xy+y2)=__________
【答案】x3-y3
【解析】(x-y)(x2+xy+y2)=x3+x2y+xy2-x2y-xy2-y3=x3-y3,
故答案为:x3-y3.