If a 7, b5 and c = 3, then the value of a² + b²+c²-ab-bc-ca is? - IQ786

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If a 7, b5 and c = 3, then the value of a² + b²+c²-ab-bc-ca is?

If a 7, b5 and c = 3, then the value of a² + b²+c²-ab-bc-ca is?

-12

12

0

8

Explanation