Question 361105
{{{x^4-40x^2+144=0}}}
{{{x^4-36x^2-4x^2+144=0}}}
{{{x^2(x^2-36)-4(x^2-36)=0}}}
{{{(x^2-36)(x2-4)=0}}}
{{{(x+6)(x-6)(x+2)(x-2)=0}}}
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