railway DFCCIL Executive 2025 Mock Test Quantitative Aptitude Algebra Identities

यदि a2 + b2 + c2 = 9 तथा ab + bc + ca = 8 है, तो (a + b + c) – 3 का संभावित मान क्या है?

1
5
2
3
3
9
4
2
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