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Question 58Asked in RRB JE CBT-1, 16 Dec 2024, Shift 3 (4:30 PM)

Write the expanded form of (3a + 5b + 7c)².

  1. A9a² + 25b² + 49c² + 30ab + 70bc + 52ac
  2. B9a² + 25b² + 49c² + 30ab + 70bc + 42ac
  3. C9a² + 25b² + 49c² + 30ab + 65bc + 42ac
  4. D9a² + 25b² + 49c² + 34ab + 70bc + 42ac
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Correct answer: (B) 9a² + 25b² + 49c² + 30ab + 70bc + 42ac

From RRB JE CBT-1 PYQ 16 Dec 2024, Shift 3 (4:30 PM)

This is question 58 of RRB JE CBT-1 PYQ 16 Dec 2024, Shift 3 (4:30 PM). 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.