1,2x (в квадрате)+x=0
1,2X^2 + X = 0 X * ( 1,2X + 1 ) = 0 X = 0 1,2X + 1 = 0 1,2X = - 1 X = - 1 : 6/5 = - 5/6 Ответ 0 и ( - 5/6 )