Ответ:
x(x-1)=2(x+2)
x(x-1)-2(x+2)=0
x2-x-2x-4=0
x2+x-4x-4+0
(x+1)*(x-4)=0
x+1=0 x-4=0
Ответ: x1=-1, x2=4
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Ответ:
x(x-1)=2(x+2)
x(x-1)-2(x+2)=0
x2-x-2x-4=0
x2+x-4x-4+0
(x+1)*(x-4)=0
x+1=0 x-4=0
Ответ: x1=-1, x2=4