Question 957570
(18/x)^2+x^2=45
{{{324/x^2 + x^2 - 45 = 0}}}
{{{324 + x^4 - 45x^2 = 0}}}
{{{x^4 - 45x^2 + 324 = 0}}}
{{{(x^2-9)*(x^2-36) = 0}}}
x = -3,3,-6,6