state gov Telangana (తెలంగాణ) Police Constable (Pre + Mains) Test Series 2025 Quantitative Aptitude Algebra Identities

যদি a2 + b2 + 49c2 + 18 = 2(b - 28c - a) হয়, তাহলে (a - b - 7c) এর মান কত হবে?

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