Technical information
Behaviour being used: Adaptive mode
Minimum fraction: 0
Question summary: Die Gleichung 2 _x_2 + 2 _x_ = - 4 ist äquivalent zu : 2x² + 2 x -4 = 0; x² + x = -2; 2x² = 2x - 4
Right answer summary: x² + x = -2
Question state: todo