Question

X-2 phần x+1 bằng 2

Answer 1

`(x-2)/(x+1)=2` ĐK `x≠-1`

`<=> (x-2)/(x+1) = (2(x+1))/(x+1)`

`=>x-2 = 2(x+1)`

`<=>x-2=2x+2`

`<=>x-2x=2+2`

`<=> -x=4`

`<=>x=-4(TM)`

Answer 2

=>2x+2=x-2

=>x=-4

Answer 3

\(\dfrac{x-2}{x+1}=2\left(x\ne-1\right)\)

suy ra

`x-2=2(x+1)`

`<=>x-2=2x+2`

`<=> x-2x=2+2`

`<=> -x=4`

`<=> x=-4(tm)`