x*(x+1)^2 - 2(x+1) = 0
(x+1)(x*(x+1) - 2) = 0
x1 = - 1
x^2 + x - 2 = 0
(x+2)(x-1) = 0
x2 = - 2
x3 = 1
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x*(x+1)^2 - 2(x+1) = 0
(x+1)(x*(x+1) - 2) = 0
x1 = - 1
x^2 + x - 2 = 0
(x+2)(x-1) = 0
x2 = - 2
x3 = 1