4X = 2 (x-3) + 1

4x=2x-6+1
4x-2x=-5
x=(-5)÷2
x=-2.5

x(x^2+1)^2-4x^3

Original formula = x (x ^ 4 + 2x ^ 2 + 1-4x ^ 2)
=x(x^4-2x^2+1)
=x(x^2-1)^2
=x(x+1)^2(x-1)^2

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