rozloz wielomian na czynniki:
x⁵ -3x⁴ - x³ +3x² - 6x + 18 = x⁴(x-3) - x²(x-3) - 6(x-3) = (x-3)(x⁴ - x² - 6) = (x-3)(x⁴+2x²-3x²-6) =
= (x-3)[x²(x²+2) - 3(x²+2) = (x-3)(x²-3)(x²+2) = (x-3)(x+√3)(x-√3)(x²+2)
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x⁵ -3x⁴ - x³ +3x² - 6x + 18 = x⁴(x-3) - x²(x-3) - 6(x-3) = (x-3)(x⁴ - x² - 6) = (x-3)(x⁴+2x²-3x²-6) =
= (x-3)[x²(x²+2) - 3(x²+2) = (x-3)(x²-3)(x²+2) = (x-3)(x+√3)(x-√3)(x²+2)