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Find all zeros. Real and Imaginary
f(x)= 5x^4 + 16x^2 + 3
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x^2 = (-16 ± √196)/10
= (-16 ± 14)/10
x^2 = -1/5 or x^2 = -3
x = ± i/√5 or x = ± √3 i
All four roots are imaginary
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