Question

x³-x=0
(ecuatie de gradul al doilea)​

Answer 1

x³-x=0

x(x²-1)=0

x(x²-1²)=0

x(x-1)(x+1)=0

=>

x=0

x-1=0

x+1=0

=>

x=1

x=-1

=>

x= 0,-1,1

S={0,-1,1}