Mindblank y do the coefficients need to be real in conjugate root theorem (1 Viewer)

[amdspotter]

^^^

 

[cossine]

^^^

Yes,

In mathematics, the complex conjugate root theorem states that if P is a polynomial in one variable with real coefficients, and a + bi is a root of P with a and b real numbers, then its complex conjugate a − bi is also a root of P

https://en.wikipedia.org/wiki/Complex_conjugate_root_theorem