যদি 3x2 + ax + 4 রাশিটি x – 5 দ্বারা পূর্ণরূপে বিভাজিত হয়, তাহলে a-র মান কত হবে নির্ণয় করুন।

This question was previously asked in
RRB ALP Previous Paper 2 (Held On: 9 Aug 2018 Shift 2)
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  1. -12
  2. -5
  3. -15.8
  4. -15.6

Answer (Detailed Solution Below)

Option 3 : -15.8
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3x2 + ax + 4 রাশিটি x – 5 দ্বারা পূর্ণরূপে বিভাজিত হলে,

⇒ 3 × 25 + 5a + 4 = 0

⇒ 5a = -79

∴ a = -15.8
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