Rozwiąż równania : a)x^3-2x^2+x-2=0 b)x(x+1)^2(x-pierw z 3)(x+pierw z 3) c)x^4+18x^2=9x^3

a) x³-2x²+x-2 = 0 x³+x-2(x² + 1) = 0 x(x²+1) - 2(x²+1) = 0 (x²+1)(x-2) = 0 x = 2 w b) i c) zabrakło znaku "=" ? b) x(x+1)²(x-√3)(x+√3) = 0 x = 0 lub x = -1 lub x = √3 lub x = -√3 c) x⁴+18x²=9x³ x⁴-9x³+18x² = 0 x²(x²-9x+18) = 0 x²-9x+18 = 0 Δ = (-9)²-4*18 = 81-72 = 9 x₁ = (9-3)/2 lub x₂ = (9+3)/2 x₁ = 3 lub x₂ = 6 x²(x-3)(x-6) = 0 x = 0 lub x = 3 lub x = 6