x(x^2-7)=6
x^3-7x=6
x^3-7x-6=0
x^3+x^2-x^2-x-6x-6=0
x^2+(x+1)-x(x+1)-6(x+1)=0
(x+1)*(x^2-x-6)=0
(x+1)*(x^2+2x-3x-6)=0
(x+1)*(x(x+2)-3(x+2)=0
(x+1)*(x+2)*(x-3)=0
x+1=0
x+2=0
x-3=0
x= -1
x= -2
x= 3
X1= -2 , X2= -1 , X3=3
x(x^2-7)=6
x^3-7x=6
x^3-7x-6=0
x^3+x^2-x^2-x-6x-6=0
x^2+(x+1)-x(x+1)-6(x+1)=0
(x+1)*(x^2-x-6)=0
(x+1)*(x^2+2x-3x-6)=0
(x+1)*(x(x+2)-3(x+2)=0
(x+1)*(x+2)*(x-3)=0
x+1=0
x+2=0
x-3=0
x= -1
x= -2
x= 3
X1= -2 , X2= -1 , X3=3