Question 289077
since F(x) is zero for these two values, they are roots of the equation
___ complex roots occur in conjugate pairs; that's why these two are the same, except for the sign


if r is a root, then (x-r) is a factor


F(x) = [x - (2+i)] [x - (2-i)] = (x - 2 - i) (x - 2 + i) = x^2 - 4x + 5