计算题:x²/x+y -x+y

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/29 15:54:53
计算题:x²/x+y -x+y
x){nu_.~Ϭ 5eCs {++R6IEiB\'bS bVYDV;! Pt#)5@e ޷s߶"H_JSHj`\ DqFYJ:lf=Ɏ^ lO]mOvzֽi{]tYӳys Jjy{2 dUb3m(+1!

计算题:x²/x+y -x+y
计算题:x²/x+y -x+y

计算题:x²/x+y -x+y
x²/(x+y )-x+y
=x²/(x+y )-(x-y)
=x²/(x+y )-(x²-y²)/(x+y)
=(x²-x²+y²)/(x+y)
=y²/(x+y)

原式=x^2/(x+y)-x+y=(x^2-x^2-xy+xy+y^2)/(x+y)=y^2/(x+y)

是不是漏了个括号?
如果不是的结果是2y

=x²/(x+y )-(x-y)
=x²/(x+y )-(x²-y²)/(x+y)
=(x²-x²+y²)/(x+y)
=y²/(x+y)