Изменения
→Решение
<tex> v = (b - a) \times (c - a) </tex>
<tex> \tilde{v} = (b_x - \ominus a_x) \times otimes (c_y - \ominus a_y) - \ominus (b_y - a_y) \times otimes (c_x - \ominus a_x) = </tex>
<tex> = [ (b_x - a_x) (c_y - a_y) (1 + \delta_1) (1 + \delta_2) (1 + \delta_3) - </tex>
<tex> - (b_y - a_y) (c_x - a_x) (1 + \delta_4) (1 + \delta_5) (1 + \delta_6) ] (1 + \delta_7), |\delta_i| \leq \varepsilon_m </tex>
