Ответы на вопрос:
Х-у=5 ху=14 х=5+у (5+у)у=14 х=5+у 5у+у^2=14 y^2+5у-14=0 d=5^2-4*(-14) = 25+56 = 81 у1 = (-5-9)/2 = -14/2 = -7 y2 = (-5+9)/2 = 4/2 = 2 х1 = 5+y1 = 5-7 = -2 y1 = -7 x2 = 5+у2 = 5+2 = 7 у2 = 2
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