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а) ((43-17)(43+17))/((69-9)(69+9))=(26*60)/(60*78)=1/3
б) (14+16)^2/(15*(17+13))=(30^2)/(15*30)=30:15=2
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!!!!!!!!!!!!!!!!!!!!!!!!!!!
а) ((43-17)(43+17))/((69-9)(69+9))=(26*60)/(60*78)=1/3
б) (14+16)^2/(15*(17+13))=(30^2)/(15*30)=30:15=2