Quantitative Aptitude Algebra Identities

ಒಂದು ವೇಳೆ a 2 + b 2 + c 2 = 6.25 ಮತ್ತು (ab + bc + ca) = 0.52 ಆಗಿದ್ದರೆ, (a + b + c) ಮೌಲ್ಯ ಎಷ್ಟು, (a + b + c) < 0?

1
\(\pm\) 2.8
2
\(\pm\) 2.7
3
-2.7
4
-2.8

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