Ответы на вопрос:
Х+ y = 6 x = 6 - y x^2 = ( 6 - y)^2 = 36 - 12y + y^2 y^2 - 2x^2 = 8 y^2 -2( 36 - 12y + y^2 ) = 8 y^2 - 72 + 24y - 2y^2 = 8 - y^2 + 24y - 80 = 0 d = 576 - 320 = 256 = 16^2 y1 = ( - 24 + 16 ) : ( - 2 ) = 4 y2 = ( - 24 - 16 ) : ( - 2 ) = 20 x = 6 - y x1 = 6 - 4 = 2 x2 = 6 - 20 = - 14 ответ ( 2 ; 4 ) ; ( - 14 ; 20 )
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