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23 March, 14:49

1. find all the zeros of the equation. - 3x^4+27x^2+1200=0

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  1. 23 March, 15:08
    0
    First divide through by - 3 to make it a bit easier to solve:-

    x^4 - 9x^2 - 400 = 0

    factoring:-

    (x^2 - 25) (x^2 + 16) = 0

    so x^2 = 25 or - 16

    so x = 5, - 5, 4i, - 4i answer
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