1.

Using the properties of determinants, prove that ∣∣∣∣ab−cc+ba+cbc−aa−bb+ac∣∣∣∣=(a+b+c)(a2+b2+c2).

Answer» Using the properties of determinants, prove that
abcc+ba+cbcaabb+ac
=(a+b+c)(a2+b2+c2).


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