\(a^2-10a+25\) किस पूर्ण वर्ग के बराबर है?
Which perfect square is equal to \(a^2-10a+25\)?
Explanation opens after your attempt
Correct Answer
B. ((a-5)2)correct square
Concept
The middle term \(-10a=-2\cdot a\cdot5\), so the sign is negative. In exams the sign of the middle term is decisive.
Why this answer is correct
The correct answer is B. ((a-5)2) / correct square. The middle term \(-10a=-2\cdot a\cdot5\), so the sign is negative. In exams the sign of the middle term is decisive.
Exam Tip
मध्य पद \(-10a=-2\cdot a\cdot5\) है इसलिए चिन्ह ऋणात्मक होगा। परीक्षा में मध्य पद का चिन्ह निर्णायक होता है।
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