If a+b+c=13 , a^2+ b^2 + c^2 =69 then find the value of ab +bc +ac. – McqOptions

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1.	If a+b+c=13 , a^2+ b^2 + c^2 =69 then find the value of ab +bc +ac.
A.	12
B.	50
C.	56
D.	67
Answer» C. 56

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