- #1

MorallyObtuse

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## Homework Statement

Express [tex]x^4 + y^4 + z^4 - 2y^2z^2 - 2z^2x^2 - 2x^2y^2[/tex] as the product of four factors.

**2. The attempt at a solution**

[tex](x-y-z)(-x+y-z)(-x-y+z)(x+y+z)[/tex]