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(x^2+mx+49) is a perfect square and (m) is positive. What will be the value of (m)?(x^2+mx+49) पूर्ण वर्ग है और (m) धनात्मक है। (m) का मान क्या होगा?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (14)(14)
(49=7^2), so the middle term is (2\cdot x\cdot7=14x). In exams, take the positive middle coefficient for a positive perfect square.(49=7^2) है इसलिए मध्य पद (2\cdot x\cdot7=14x) होगा। परीक्षा में धनात्मक पूर्ण वर्ग के लिए धनात्मक मध्य गुणांक लें।
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