Question 895278
{{{x^4=x^2}}}


{{{x^4-x^2=0}}}


{{{x^2(x^2-1)=0}}}


{{{x^2(x^2-1^2)=0}}}


{{{x^2(x-1)(x+1)=0}}}


{{{x^2=0}}} or {{{x-1=0}}} or {{{x+1=0}}}


{{{x=0}}} or {{{x=1}}} or {{{x=-1}}}


The three solutions are {{{x=0}}} or {{{x=1}}} or {{{x=-1}}}