Toán Rút gọn: $\frac{x^2 – xy+x+y}{x^2 +xy-x-y}$ 30/11/2021 By Madeline Rút gọn: $\frac{x^2 – xy+x+y}{x^2 +xy-x-y}$
`(x^2-xy+x+y)/(x^2+xy-x-y)` `=[x^2-xy+x+y]/[(x^2+xy)-(x+y)]` `=(x^2-xy+x+y)/[x(x+y)-(x+y)]` `=(x^2-xy+x+y)/[(x+y)(x-1)]` Trả lời
`(x^2-xy+x+y)/(x^2+xy-x-y)`
`=[x^2-xy+x+y]/[(x^2+xy)-(x+y)]`
`=(x^2-xy+x+y)/[x(x+y)-(x+y)]`
`=(x^2-xy+x+y)/[(x+y)(x-1)]`
`(x^2-xy+x+y)/(x^2+xy-x-y)`
`=(x^2-xy+x+y)/((x(x+y)-(x+y))`
`=(x^2-xy+x+y)/((x+y)(x-1))`