na czynniki w= x do5=2xdo4+5xdo3 w=4xdo4+8xdo3+4xdo2 w=2xdo3+10xdo2-18x-90

W(x) = x⁵ + 2x⁴ + 5x³ = x³(x² + 2x + 5) W(x) = 4x⁴ + 8x³ + 4x² = 4x²(x² + 2x + 1) = 4x²(x + 1)² = 4x²(x + 1)(x + 1) W(x) = 2x³ + 10x² - 18x - 90 = 2(x³ + 5x² - 9x - 45) = 2[x²(x + 5) - 9(x + 5)] =          = 2(x + 5)(x² - 9) = 2(x + 5)(x + 3)(x - 3)