ଯଦି ଏକ 2 + b 2 + c 2 = 6.25 ଏବଂ (ab + bc + ca) = 0.52, ଯଦି (a + b + c) <0 ର ମୂଲ୍ୟ କ’ଣ?

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

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