{2x-3y=-18
{xy=-12
Помогите

2х - 3y = - 18 Xy = - 12 Решение 2х = 3y - 18 X = 1,5y - 9 y( 1,5y - 9 ) = - 121,5y^2 - 9y + 12 = 0 D = 81 - 72 = 9 = 3^2 y1 = ( 9 + 3 ) : 3 = 4 y2 = ( 9 - 3 ) : 3 = 2 X = 1,5y - 9 X1 = 1,5•4 - 9 = - 3 X2 = 1,5•2 - 9 = - 6 Ответ ( - 3 ; 4 ) ; ( - 6 ; 2 )