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1. 3x2 + ax + a + 3 divisible x + 2?

  • A. 12
  • B. 12
  • C. 12
  • D. 12

Answer: Option D

Explanation:

ধরি, f(x) = 3x² + ax + a + 3
f(x), x + 2 দ্বারা বিভাজ্য সেহেতু
f( - 2) = 0 হবে
⇒ 3( - 2)² + a( - 2) + a + 3 = 0
⇒12 - 2a + a + 3 = 0
⇒ - a + 15 = 0
⇒a = 15.

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