\(4x^2+12x+k\) पूर्ण वर्ग हो तो (k) क्या होगा?
If \(4x^2+12x+k\) is a perfect square, what is (k)?
Explanation opens after your attempt
B. (9)correct constant
Concept
(4x-2=(2x)2) and \(12x=2\cdot2x\cdot3\), so (k=9). In exams identify the second part using (2ab).
Why this answer is correct
The correct answer is B. (9) / correct constant. (4x-2=(2x)2) and \(12x=2\cdot2x\cdot3\), so (k=9). In exams identify the second part using (2ab).
Exam Tip
(4x-2=(2x)2) और \(12x=2\cdot2x\cdot3\), इसलिए (k=9) है। परीक्षा में (2ab) से दूसरा भाग पहचानें।
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