题目内容
【题目】化简(x+y)2+(x+y)(x-y)=____________________.
【答案】2x2+2xy
【解析】(x+y)2+(x+y)(x-y)=x2+2xy+y2+x2-y2=2x2+2xy
故答案为:2x2+2xy
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题目内容
【题目】化简(x+y)2+(x+y)(x-y)=____________________.
【答案】2x2+2xy
【解析】(x+y)2+(x+y)(x-y)=x2+2xy+y2+x2-y2=2x2+2xy
故答案为:2x2+2xy