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Question 54Asked in RRB JE CBT-1, 17 Dec 2024, Shift 1 (9:00 AM)

Write the expanded form of (7a + 9b + 4c)².

  1. A49a² + 81b² + 16c² + 126ab + 72bc + 56ac
  2. B49a² + 81b² + 16c² + 126ab + 72bc + 66ac
  3. C49a² + 81b² + 16c² + 130ab + 72bc + 56ac
  4. D49a² + 81b² + 16c² + 126ab + 67bc + 56ac
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Correct answer: (A) 49a² + 81b² + 16c² + 126ab + 72bc + 56ac

From RRB JE CBT-1 PYQ 17 Dec 2024, Shift 1 (9:00 AM)

This is question 54 of RRB JE CBT-1 PYQ 17 Dec 2024, Shift 1 (9:00 AM). See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.