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(1/5)*x*(3*x^2-10)^12 = 0
1/5*x*(3*x^2-10)^12 = 0
( 1/5*x )
1/5*x = 0 // : 1/5
x = 0
( 3*x^2-10 )
3*x^2 = 10 // : 3
x^2 = 10/3
x^2 = 10/3 // ^ 1/2
abs(x) = (10/3)^(1/2)
x = (10/3)^(1/2) or x = -(10/3)^(1/2)
x in { 0, (10/3)^(1/2), -(10/3)^(1/2), (10/3)^(1/2), -(10/3)^(1/2), (10/3)^(1/2), -(10/3)^(1/2), (10/3)^(1/2), -(10/3)^(1/2), (10/3)^(1/2), -(10/3)^(1/2), (10/3)^(1/2), -(10/3)^(1/2), (10/3)^(1/2), -(10/3)^(1/2), (10/3)^(1/2), -(10/3)^(1/2), (10/3)^(1/2), -(10/3)^(1/2), (10/3)^(1/2), -(10/3)^(1/2), (10/3)^(1/2), -(10/3)^(1/2), (10/3)^(1/2), -(10/3)^(1/2) }
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