Шахло Хайдарова Ответ. P3=(U3^2)/R3; R12=(R1*R2)/(R1+R2); R12=4; U12=(U3/R3)*R12; U12=8; P1=(U12^2)/R1; P2=(U12^2)/R2; P1=64/6; P2=64/12;