Question 856301
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Hi,
F(x)= (x-3i)(x+3i)(x-2)(x+2)  Yes
    ={{{ (x^2 + 9)(x^2 - 4) = x^2(x^2-4) + 9(x^2-4) = x^4 - 4x^2 + 9x^2 - 36 = x^4 + 5x^2 -36}}}