Question 370649
{{{x^2+1/x^2=38}}}.  Square both sides to get{{{x^4 + 2*(x^2)*(1/x^2) + 1/x^4 = 1444}}}.
{{{x^4 + 2 + 1/x^4 = 1444}}},
or {{{x^4  + 1/x^4 = 1442}}}.