\(x^2+kx+16\) पूर्ण वर्ग हो और (k) धनात्मक हो तो (k) का मान क्या है?
If \(x^2+kx+16\) is a perfect square and (k) is positive, what is the value of (k)?
Explanation opens after your attempt
Correct Answer
B. (8)correct middle coefficient
Concept
\(16=4^2\), and in a perfect square the middle term is \(2\cdot x\cdot4=8x\). In exams double the root of the constant term.
Why this answer is correct
The correct answer is B. (8) / correct middle coefficient. \(16=4^2\), and in a perfect square the middle term is \(2\cdot x\cdot4=8x\). In exams double the root of the constant term.
Exam Tip
\(16=4^2\) और पूर्ण वर्ग में मध्य पद \(2\cdot x\cdot4=8x\) होगा। परीक्षा में स्थिर पद की जड़ को दोगुना करें।
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