Быстрый ответ
$$x_{1} = - \frac{\sqrt{21} i}{7}$$
=
$$- \frac{\sqrt{21} i}{7}$$
=
-0.654653670707977*i
$$y_{1} = \sqrt{21} i$$
=
$$\sqrt{21} i$$
=
4.58257569495584*i
$$x_{2} = \frac{\sqrt{21} i}{7}$$
=
$$\frac{\sqrt{21} i}{7}$$
=
0.654653670707977*i
$$y_{2} = - \sqrt{21} i$$
=
$$- \sqrt{21} i$$
=
-4.58257569495584*i