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Which perfect square is equal to (a^2-10a+25)?(a^2-10a+25) किस पूर्ण वर्ग के बराबर है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: ((a-5)^2)correct square / ((a-5)^2) सही वर्ग
The middle term (-10a=-2\cdot a\cdot5), so the sign is negative. In exams the sign of the middle term is decisive.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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