goldenarrow
goldenarrow goldenarrow
  • 24-05-2017
  • Mathematics
contestada

solve x^4+3x^2-4=0

please show work, thank you :)

Respuesta :

hopkinsbailey hopkinsbailey
  • 24-05-2017
x^4+3x^2=4
x^2(x^2+3)=4
x=1 or 2
Answer Link
Аноним Аноним
  • 24-05-2017
x^4 + 3x^2 - 4 = 0
(x^2 - 1))(x^2 + 4) = 0
x^2 - 1 = 0  giving x = 1 and x = -1

x^2 + 4 = 0 giving  x^2  = -4  so x = +2i  and  -2i.
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