1/x+2=2+2x/1-x
(x+2)(1-x)(1/x+2)=(x+2)(1-x)(2+2x/1-x)
1-x=x-x2+1-2X+2x2+4x
1-x=x2+3x+1
0=x2+4x
x1=0,x2=-4