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यदि ` x = 1 + 2i , ` तो ` x ^ 2 - 2 x + 5 = ?`A. 1B. -1C. 0D. इनमे से कोई नहीं |
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Answer» Explanation : प्रश्न से, ` x = 1 + 2i rArr x - 1 = 2i ` ` rArr ( x - 1 ) ^ 2 = 4i ^ 2 rArr x^ 2 - 2x + 1 = -4 rArr x ^ 2 - 2x + 5 = 0 ` |
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