Question

Решите 4 вариант (Нужно срочно)​

Answer 1

Ответ:

$z_{1} =3+9i\\z_{1}^2 =(3+9i)^2=9+54i+81i^2=9+54i-81=-72+54i\\Re z_{1}^2 = -72$

$z_{2} =4-\sqrt{5}i\\z_{2}^2 =(4-\sqrt{5}i)^2=16-8\sqrt{5}i+5i^2 = 16-8\sqrt{5}i-5 = 11-8\sqrt{5}i \\Re z_{2}^2 = 11$