engineering recuitment BARC Stipendiary Trainee Category II 2023 Mock Test Quantitative Aptitude Algebra Identities

যদি (a + b + c) = 7 এবং ab + bc + ca = 12 হয়, তাহলে  a2 + b2 + c2 এর মান কত হবে? 

1
29
2
31
3
27
4
25
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