\(x^2-14x+49\) किस पूर्ण वर्ग के बराबर है?
Which perfect square equals \(x^2-14x+49\)?
Explanation opens after your attempt
D. ((x-7)2)
Concept
Here \(49=7^2\) and \(-14x=-2\cdot7\cdot x\). Exam tip: identify ((x-7)2) from the negative middle term.
Why this answer is correct
The correct answer is D. ((x-7)2). Here \(49=7^2\) and \(-14x=-2\cdot7\cdot x\). Exam tip: identify ((x-7)2) from the negative middle term.
Exam Tip
\(49=7^2\) और \(-14x=-2\cdot7\cdot x\) है। परीक्षा में ऋणात्मक मध्य पद से ((x-7)2) पहचानें।
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