# Pre Calculus

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please explain the process of finding the complex zeros of f(x)=x^4+5x^2+4.

• Pre Calculus -

so we are solving x^4+5x^2+4
it factors
(x^2+1)(x^2+4) = 0
x^2 = -1 or x^2 = -4
x = +/- i or x = +/- 2i where i = √-1

• Pre Calculus -

Thank you

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