Solve each equation.
x^4 -x=0
x^4-81=0
x^4-x = 0
x(x^3-1) = 0
x(x-1)(x^2+x+1) = 0
do the other the same way. Factor it out. Each of the factors may be zero.
x^4 -x=0
x^4-81=0
x(x^3-1) = 0
x(x-1)(x^2+x+1) = 0
do the other the same way. Factor it out. Each of the factors may be zero.