3x2 + ax + 4  ஆனது x – 5 ஆல் முழுமையாக வகுபடுமானால், a இன் மதிப்பு என்ன?

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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 ஆனது x – 5 ஆல் முழுமையாக வகுபடும்.

⇒ 3 × 25 + 5a + 4 = 0

⇒ 5a = -79

∴ a = -15.8

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