Subject
NSI নিয়োগ
Topic
জাতীয় নিরাপত্তা গোয়েন্দা সংস্থা (NSI) (সহকারী পরিচালক) - ০৮.১০.২০২১
What is the value of a, if 3x2+ ax + a + 3 divisible by x + 2?
What is the value of a, if 3x2+ ax + a + 3 divisible by x + 2?
ক)
12খ)
13গ)
14ঘ)
15Explanation
ধরি, f(x) = 3x² + ax + a +3 যেহেতু, 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 = 15Related questions
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