August 2021 0 9 Report
ПОМОГИТЕ ПОЖАЛУЙСТА!!!!!!!!!   Пусть x1 и x2--корни уравнения x2-4x-7=0.  Не решая уравнения, найдите значение выражения x1(2)+x2(2) ( x1(в квадрате) + x2( в квадрате)  
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