x³+x²-x-x=0 x³+7x²-3x+21=0 24x³+12x²-x-3=0 6x³+18x²-6x-18=0

x³+x²-x-x=0 x(x²-1-1)=0 x(x²-2)=0 x²=2 x=0 x=pierwiastek z 2 x=pierwiastek z -2 x³+7x²-3x+21=0 pod x podstawiamy - 7 -343*343-21+21=0 (x+7) x²-3 ___________ x³+7x²-3x+21/(x+7) -x³-7x² = = -3x+21 3x-21 = = 6x³+18x²-6x-18=0 6x²(x+3)-6(x+3)=0 (x+3)(6x²-6)=0 x=3 6x²=6 x²=1 x=1 x=-1