х³+3х²-18х=0
х(х²+3х-18)=0
х1=0
х²+3х-18=0
√Д = √9+4*18 = √9+72 = √81 = 9
х2х3 = -3±9/2
х2 = -3+9/2 = 3
х3 = -3-9/2 = -6
ответ: х1=0,х2=3,х3=-6
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х³+3х²-18х=0
х(х²+3х-18)=0
х1=0
х²+3х-18=0
√Д = √9+4*18 = √9+72 = √81 = 9
х2х3 = -3±9/2
х2 = -3+9/2 = 3
х3 = -3-9/2 = -6
ответ: х1=0,х2=3,х3=-6