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Question 53Asked in RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)

Write the expanded form of (9a + 6b + 4c)².

  1. A81a² + 36b² + 16c² + 108ab + 43bc + 72ac
  2. B81a² + 36b² + 16c² + 108ab + 48bc + 72ac
  3. C81a² + 36b² + 16c² + 108ab + 48bc + 82ac
  4. D81a² + 36b² + 16c² + 112ab + 48bc + 72ac
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Correct answer: (B) 81a² + 36b² + 16c² + 108ab + 48bc + 72ac

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

This is question 53 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.