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Which completed square form is correct for (7x^2-14x+19=0)?(7x^2-14x+19=0) में पूर्ण वर्ग रूप कौनसा सही है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (7(x-1)^2+12=0)(7(x-1)^2+12=0)
(7x^2-14x+19=7(x-1)^2+12), so it cannot be zero for real (x). In exams, completed square form also shows the nature of roots.(7x^2-14x+19=7(x-1)^2+12), इसलिए यह वास्तविक (x) के लिए शून्य नहीं हो सकता। परीक्षा में पूर्ण वर्ग रूप से भी मूलों की प्रकृति दिखती है।
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