If a2 + b2 + c2 = 300 and ab + bc + ca = 50 then what is the value of – McqOptions

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1.	If a2 + b2 + c2 = 300 and ab + bc + ca = 50 then what is the value of a + b + c ? (Given that a, b and c are all positive)
A.	15
B.	22
C.	20
D.	25
Answer» D. 25

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