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# If x2 + x – 1 = 0 and 2x2 - x + 1 = 0 have a common root then- (A) 22 – 72 + 1 = 0 (B) 22 + 72 - 1 = 0 (C) 22 + 72 + 1 = 0 (D) 22 – 72 - 1 = 0

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