railway RRB JE (CBT I + CBT II) Mock Test 2024 Quantitative Aptitude Algebra Identities

If a (a + b + c) = 45; b (a + b + c) = 75 and c (a + b + c) = 105, then find the value of a2 + b2 + c2.

1
90
2
625
3
225
4
83
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