【(x+y)²-(x-y)²】/2xy

来源:学生作业帮助网 编辑:六六作业网 时间:2024/05/11 05:09:14
【(x+y)²-(x-y)²】/2xy【(x+y)²-(x-y)²】/2xy【(x+y)²-(x-y)²】/2xy【(x+y)²-

【(x+y)²-(x-y)²】/2xy
【(x+y)²-(x-y)²】/2xy

【(x+y)²-(x-y)²】/2xy

【(x+y)²-(x-y)²】/2xy
=[(x²+2xy+y²)-(x²-2xy+y²)]÷2xy
=4xy÷2xy
=2