学帮网已知(x-y)/(x+y)=-1/2,则分式(x²+4xy+3y²)/(x²+2xy-3y²)的值等于
来源：学生作业学帮网 编辑：学帮网 时间：2024/05/18 06:50:38
已知(x-y)/(x+y)=-1/2,则分式(x²+4xy+3y²)/(x²+2xy-3y²)的值等于
(X-Y)/(X+Y)=-1/2
(X+Y)/(X-Y)=-2
(X+Y)(X+3Y)/(X+3Y)(X-Y)
=(X+Y)/(X-Y)
=-2
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来源：学生作业学帮网 编辑：学帮网 时间：2024/05/18 06:50:38
已知(x-y)/(x+y)=-1/2,则分式(x²+4xy+3y²)/(x²+2xy-3y²)的值等于
(X-Y)/(X+Y)=-1/2
(X+Y)/(X-Y)=-2
(X+Y)(X+3Y)/(X+3Y)(X-Y)
=(X+Y)/(X-Y)
=-2