х -скорость лодки
24/(х+2)+8/(х-2)=5 ( 24*(х-2)+8*(х+2))/((х+2)*(х-2))=5
24х-48+8х+16=5х2-20 5х2-32х+12=0 Д=1024-240=784 (282)
х1=(32-28)/10=4/10=0,4 х2=(32+28)/10=6
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х -скорость лодки
24/(х+2)+8/(х-2)=5 ( 24*(х-2)+8*(х+2))/((х+2)*(х-2))=5
24х-48+8х+16=5х2-20 5х2-32х+12=0 Д=1024-240=784 (282)
х1=(32-28)/10=4/10=0,4 х2=(32+28)/10=6