Question 804504
imaginary roots come in pairs. 3+i, 3-i, -3
(x-(3+i))(x-(3-i))(x+3)
{{{(x-(3+i))(x-(3-i))}}}
{{{(x-3-i)(x-3+i)}}}
{{{x^2-3x+ix-3x+9-3i-ix+3i-i^2}}}
Combine like terms
{{{x^2+(-3x)+(ix)+(-3x)+9+(-3i)+(-ix)+(3i)-i^2}}}
{{{x^2-6x+10}}}