Question

Найти комплексные корни уравнениния
X^2-12x+61=0

Answer 1

$x^2-12x+61=x^2-12x+36+25=(x-6)^2-(5i)^2=\\=(x-6-5i)(x-6+5i)=0\\\\x_1 = 6-5i, x_2 = 6+5i$

Answer 2

Х=12+√144-244/2=х€R

У=0