Verified answer

Ответ:

4/z-1 - z/z+1 + 10/z^2 - 1=0

4/z-1 - z/z+1 +10/(z-1)(z+1) =0

4(z+1)-z(z-1)+10/(z-1)(z+1) =0

4z+4-z^2 +z+10/(z-1)(z+1) =0

5z+14-z^2 =0

-z^2 +5z+14=0

z^2 - 5z-14=0

z(z+2)-7(z+2)=0

(z+2)(z-7)=0

z+2=0

z-7=0

z1=-2

z2=7