b2=-2*1/(-5)=2/5=0.4
b3=-2*1/0.4=-2/0.4=-(20/4)= -5
Ответ: -5
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b2=-2*1/(-5)=2/5=0.4
b3=-2*1/0.4=-2/0.4=-(20/4)= -5
Ответ: -5