Question

упростите выражение
2x/x^2 - 2/x^2-4 / (X+1/2x-2 -1/x-1)

Answer 1

1)(x+1)/2(x-1) -1/(x-1)=(x+1-2)/2(x-1)=(x-1)/2(x-1)=1/2
2)2/(x²-4) :1/2=4/(x²-4)
3)2x/(x²-4)-4/(x²-4)=(2x-4)/(x²-4)=2(x-2)/(x-2)(x+2)=2/(x+2)