Q: If a = 7, b = 5 and c = 3, then the value of $$a^2+b^2+c^2-ab-bc-ca – McqOptions

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1.	Q: If a = 7, b = 5 and c = 3, then the value of $$a^2+b^2+c^2-ab-bc-ca$$ is
A.	0
B.	8
C.	12
D.	-12
Answer» D. -12

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