railway RRB Junior Hindi Translator 2025 Mock Test Series Quantitative Aptitude Algebra Identities

যদি a + b + c = 6, a2 + b2 + c2 = 32 এবং a3 + b3 + c3 = 189 হয়, তাহলে 4abc এর মান কত?

1
8
2
12
3
9
4
16
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