Work Step by Step
We need to write down the polynomial $f(x)$ in factored form. $f(x)=(x-3i)(x+3i)[x-(2-i)][x-(2+i)]=(x^2+9)[(x-2)^2+1]$ $=(x^2+9)[x^2-4x+5)$ $=x^4-4x^3+5x^2+9x^2-36x+45$ $=x^4-4x^3+14x^2-36x+45$
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