1/(x+2) +1/(x² -2x) =8/(x³ -4x) ;
1/(x+2) +1/x(x -2) =8/x(x -2)(x+2) ; * * * x³ -4x =x(x² -4)=x(x² -2²) =x(x -2)(x+2 * * *
x(x-2) +1(x+2) =8;
x² -2x+x+2 =8 ;
x² -x -6 =0 ⇒x₁ = - 2 , x₂ =3.
*******************************
дискриминант D =1² -4*1(-6) =1+24 =25 =5².
x₁ = (1-5)/2 =-2;
x₂ =(1+5)/2 =3.