Question 985991
If x^4 +3x^2 + 1 = 0
then x = ?
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Sub u for x^2
{{{u^2 + 3u + 1 = 0}}}
*[invoke quadratic "u",1,3,1]
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{{{x^2 = -3/2 +-sqrt(5)/2}}}
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x = {{{0+-sqrt( -3/2 + sqrt(5)/2)}}}
x = {{{0 +-sqrt( -3/2 - sqrt(5)/2)}}}