Question 503722
{{{x^4 -3x^2y^2 + 2y^4}}}
.
To make factoring easier, use the "u-substitution" method:
{{{u = x^2}}}
{{{v = y^2}}}
.
{{{u^2 -3uv + 2v^2 = (u -v)(u -2v)}}}
.
{{{(x^2 -y^2)(x^2 -2y^2)}}}
.
{{{(x-y)(x+y)(x-sqrt(2)y)(x+sqrt(2)y)}}}