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18 September, 22:17

What are the types of roots of the equation below?

x^4 - 81 = 0

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  1. 18 September, 22:28
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    X^4-81=0

    (x^2+9) (x^2-9) = 0

    (not real) = 0 (x^2-9) = 0

    (x^2-9) = (x+3) (x-3)

    Real roots=-3,3, also irrational - (-9) ^ (1/2), (-9) ^ (1/2)
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