如果a+b=2012，a-b=1，那么a2-b2=______．
人气：302 ℃ 时间：2020-05-23 13:54:14
解答
a2-b2=（a+b）（a-b），
∵a+b=2012，a-b=1，
∴a2-b2=（a+b）（a-b）=2012×1=2012．
故答案为2012．
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