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Question 14Asked in RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)

Write the expanded form of (5a + 4b + 9c)².

  1. A25a² + 16b² + 81c² + 44ab + 72bc + 90ac
  2. B25a² + 16b² + 81c² + 40ab + 72bc + 90ac
  3. C25a² + 16b² + 81c² + 40ab + 72bc + 100ac
  4. D25a² + 16b² + 81c² + 40ab + 67bc + 90ac
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Correct answer: (B) 25a² + 16b² + 81c² + 40ab + 72bc + 90ac

From RRB JE CBT-1 PYQ 18 Dec 2024, Shift 1 (9:00 AM)

This is question 14 of RRB JE CBT-1 PYQ 18 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.