livschweitzerox9s18
livschweitzerox9s18 livschweitzerox9s18
  • 28-11-2017
  • Mathematics
contestada

Find all real and complex roots of the equation below x^4-81=0

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konrad509
konrad509 konrad509
  • 16-08-2018

[tex] x^4-81=0 \\
(x^2-9)(x^2+9)=0\\
(x-3)(x+3)(x^2+9)=0\\
x=3 \vee x=-3 \vee x=3i \vee x=-3i [/tex]

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