Write a polynomial of least degree with real coefficients and with the root 7β12π.
complex roots appear as conjugates, that is,
if one is 7 - 12i, the other is 7 + 12i
sum of roots = 7-12i + 7+12i = 14
product or roots = (7 - 12i)(7 + 12i) = 49 - 144i^2 = 49+144 = 193
equation:
x^2 - 14x + 193 = 0
so your polynomial is x^2 - 14x + 193