\(x^2-14x+c\) पूर्ण वर्ग हो तो (c) क्या होगा?
If \(x^2-14x+c\) is a perfect square, what is (c)?
Explanation opens after your attempt
C. (49)square of half coefficient
Concept
\(-14x=-2\cdot x\cdot7\), so \(c=7^2=49\). In exams take half of the middle coefficient and square it.
Why this answer is correct
The correct answer is C. (49) / square of half coefficient. \(-14x=-2\cdot x\cdot7\), so \(c=7^2=49\). In exams take half of the middle coefficient and square it.
Exam Tip
\(-14x=-2\cdot x\cdot7\), इसलिए \(c=7^2=49\) है। परीक्षा में मध्य गुणांक का आधा लेकर उसका वर्ग करें।
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