January 2019 0 24 Report
Rozwiąż równanie wielomianowe. Czy to jest dobrze rozwiązane? Jeśli nie to jak powinno być ?
x³-7x²+15x-9=0

x³-3x²-4x²-12x+27x-9
x²(x-3) - 4x(x-3) + 9(x-3)
(x²-4x+9) (x-3)
Δ<0
x1=3
x1=3 ∈ R
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