Ответ:
x3+2x2-5x-6=0
(x3+x2) + (x2-5x-6)=0
x2(x+1)+(x+1)(x-6)=0
(x+1)(x2+x-6)=0
(x+1)(x+3)(x-2)=0
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Ответ:
x3+2x2-5x-6=0
(x3+x2) + (x2-5x-6)=0
x2(x+1)+(x+1)(x-6)=0
(x+1)(x2+x-6)=0
(x+1)(x+3)(x-2)=0