学帮网1-(x-y)/(x+2y)÷（x²-y²）/（x²+4xy+4y²）,化简
来源：学生作业学帮网 编辑：学帮网 时间：2024/07/07 19:02:07
1-(x-y)/(x+2y)÷（x²-y²）/（x²+4xy+4y²）,化简
原式=1-(x-y)/(x+2y)÷(x+y)(x-y)/(x+2y)²
=1-(x-y)/(x+2y)*(x+2y)²/(x+y)(x-y)
=1-(x+2y)/(x+y)
=[(x+y)-(x+2y)]/(x+y)
=-y/(x+y)
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来源：学生作业学帮网 编辑：学帮网 时间：2024/07/07 19:02:07
1-(x-y)/(x+2y)÷（x²-y²）/（x²+4xy+4y²）,化简
原式=1-(x-y)/(x+2y)÷(x+y)(x-y)/(x+2y)²
=1-(x-y)/(x+2y)*(x+2y)²/(x+y)(x-y)
=1-(x+2y)/(x+y)
=[(x+y)-(x+2y)]/(x+y)
=-y/(x+y)