Algebra

What are the real and complex solutions of the polynomial equation?

x^4 - 41x^2 = -400

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  1. x^4 - 41x^2 = -400
    x^4 - 41x^2 + 400 = 0
    (x^2-16)(x^2-25) = 0
    x = ±4,±5

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