5a2 - 4a - 3 - 3 ( a2 + a + 4 ) = 0 . What is the sum of the possible value of a ?
Solution
Correct Answer: Option B
দেয়া আছে, 5a2 - 4a - 3 - 3 ( a2 + a + 4 0 = 0
=> 5a2 - 4a - 3 - 3a2 - 3a - 12 = 0
=> 2a2 - 7a - 15 = 0
এই সমীকরণে, a =2, b= -7 এবং c = -15
∴ আমরা জানি, মূলদ্বয়ের সমষ্টি = -b/a = -(-7)/2 = 7/2 = 3.5
=> 5a2 - 4a - 3 - 3a2 - 3a - 12 = 0
=> 2a2 - 7a - 15 = 0
এই সমীকরণে, a =2, b= -7 এবং c = -15
∴ আমরা জানি, মূলদ্বয়ের সমষ্টি = -b/a = -(-7)/2 = 7/2 = 3.5
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