Write as a polynomial function

Question

X = 4, 2+i, 2-i

change the x’s into a polynomial function

Answer 1

f(x) = A(x - 4) [x - (2 + i)] [x - (2 - i)]

where A is real and A ≠ 0.

Answer 2

y = (x-4)(x-2-i)(x-2+i) or when you multiply the polynomials

y = x³ -8x² + 21x - 20