1.

Prove that: ∣∣∣∣∣y2z2yzy+zz2x2zxz+xx2y2xyx+y∣∣∣∣∣=0

Answer»

Prove that:
∣∣
∣
∣
∣
y2z2yzy+zz2x2zxz+xx2y2xyx+y∣∣
∣
∣
∣
=0



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