решите уровнение 3,4x-26,4=24,6

разложим     3x^2 = 5x^2 - 2 x^2;x^4 -6x^3 +5x^2 - 2 x^2 + 26 x - 24 =0;(x^4 - 6 x^3 + 5 x^2) - 2(x^2 - 13 x +12) =0;x^2(x^2 -6x +5) -2(x^2 - 13x +12)=0;x^2(x-1)(x-5) - 2(x-1)(x-12) =0;(x-1)(x^2(x-5) - 2(x-12) ) =0;x-1=0;x=1;x^3 - 5 x^2 - 2x + 24=0;-2x=6x - 8x;(x^3 - 5x^2 +6x) - 8x +24 =0;x(x^2 - 5x+6) - 8(x-3) =0;x(x-3)(x-2) - 8 (x-3) =0;(x-3)(x(x-2) -8) =0;(x-3)(x^2-2x-8)=0;x-3=0; x=3.x^2 -2x-8=0;D=4+32=36=6^2;x=4; x= -2. Ответ х = -2,  х= 1, х =3, х = 4