Решите систему уравнений x+3y=11 2x+y^2=14
X = 11 - 3Y 2 * ( 11 - 3Y ) + Y^2 = 14 22 - 6Y + Y^2 = 14 Y^2 - 6Y + 8 = 0 D = 36 - 32 = 4 ; √ D = 2 Y1 = ( 6 + 2 ) : 2 = 4 y2 = ( 6 - 2 ) : 2 = 2 X1 = 11 - 12 = - 1 X2 = 11 - 6 = 5 ОТВЕТ ( - 1 ; 4 ) ; ( 5 ; 2 )