SSC SSC CPO Mock Test Series 2025 (Tier I & II) (DP SI & CAPF) Quantitative Aptitude Algebra Identities

यदि a + b + c = 0 है और a²+ b² + c² = 40 है, तब ab + bc + ca का मान कितना है?

1

-30

2

-20

3

-25

4

-40

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