(x-1)(6x^3 +5x<span>^2 -2x-1)=0
(х-1)(x+1)(6x</span><span>^2 -x-1)=0
(x-1)(x+1_(x-0.5)(x+1/3)=0</span>
4x^2+6x-6x-9-1=5x+x^2-4x-4
4x^2-10=x+x^2-4
3x^2-14-x=0
3x^2-x-14=0
a= 3 b= x c= -14
D= (b)^2-4ac
...
(x²-16)/x(3x+12) +4/x= (x²-16)/x(3x+12) + (12x+48)/x(3x+12)= (x²-16+12x+48)/x(3x+12)= (x²+12x+32)/x(3x+12)= (x+8)(x+4)/3x(x+4)= (x+8)/3x
(-0,2+8)/3*(-0,2)= 7,8/(-0,6)= -13