Question

1,2x (в квадрате)+x=0

Answer 1

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 )