help Write a polynomial function of minimum degree with real coefficients whose zeros include those listed. Write the polynomial in standard form.
2, -4, and 1 + 3i

f(x) = x4 - 2x2 + 36x - 80
f(x) = x4 - 3x3 + 6x2 - 18x + 80
f(x) = x4 - 9x2 + 36x - 80
f(x) = x4 - 3x3 - 6x2 + 18x - 80

Step-by-step explanation:

Step-by-step explanation:

Let f(x) be the polynomial function of minimum degree with real coefficients whose zeros are 5, -3, and -1 + 3i be f(x).

By the complex conjugate property of polynomials, -1-3i is also a root of this polynomial.

Therefore the polynomial in factored form is

We expand to get:

We expand further to get:\

60.96438

step-by-step explanation:

1.677

step-by-step explanation:

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