(x² + 1)(x - 2) - x³ = - 2x²
x³ - 2 - 2x² + x - x³ = - 2x²
x³ - x³ - 2x² + 2x² + x - 2 = 0
x - 2 = 0
x = 2
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(x² + 1)(x - 2) - x³ = - 2x²
x³ - 2 - 2x² + x - x³ = - 2x²
x³ - x³ - 2x² + 2x² + x - 2 = 0
x - 2 = 0
x = 2