14. Из предложенных уравнений не имеет корней: A) 5x²-2x+1=0 B) x² +5x +1 = 0 C) 2x2 -x-1=0 D) x² + 14x +49 -0 E) -3x² + 2x + 1 =0 F) x² +3x +4=0 G) 5x² + 2x-1 =0 H) x² + 4x + 7 = 0​
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