a³+3a²-a = 3
a³+3a²-a - 3=0
а²(а+3)-(а+3)=0
(а+3)(а²-1)=0
(а+3)(а+1)(а-1)=0
а₁=-3 а₂=-1 а₃=1
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a³+3a²-a = 3
a³+3a²-a - 3=0
а²(а+3)-(а+3)=0
(а+3)(а²-1)=0
(а+3)(а+1)(а-1)=0
а₁=-3 а₂=-1 а₃=1