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5x³- x² = 20x + 4
5x³-x²-20x-4=0
x²(5x-1)-4(5x+1)=0 sprawdź znaki aja edytuje oki?
2
2x³-x²+2x-1=0
x²(2x-1)+(2x-1)=0
(x²+1)(2x-1)=0 x²≠-1 zawsze dlatego
2x-1=0
2x=1 :2
x=1/2