1.

Prove that ∣∣∣∣b+ca−bac+ab−cba+bc−ac∣∣∣∣=3abc−a3−b3−c3 .

Answer» Prove that
∣∣
∣
∣
b+ca−bac+ab−cba+bc−ac∣∣
∣
∣
=3abc−a3−b3−c3
.


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