Odpowiedź :
(x²-16/x²-2x+1):(x+4/x-1)=(x²-16/x²-2x+1)*(x-1/x+4)=((x-4)(x+4))/(x-1)²*(x-1/x+4)=po skróceniu zostaje=(x-4)/(x-1)
x²-16/x²-2x+1):(x+4/x-1)=(x²-16/x²-2x+1)*(x-1/x+4)=((x-4)(x+4))/(x-1)²*(x-1/x+4)=((x-4)*(x+4)/(x-1)*(x-1))*((x-1)/(x+4))=(x-4)/(x-1)
x²-16/x²-2x+1/x+4/x-x²=
(x⁴-16-2x+x+4x-x⁴)
=-----------------------=
x²
3x-16
=_____
x²
(x⁴-16-2x+x+4x-x⁴)
=-----------------------=
x²
3x-16
=_____
x²