2. Определите квадратное уравнение, сумма корней которого рав-
на 3:
а) х2 + 5х – 3 = 0;
6) x2 – 5x + 3 = 0;
в) х2 – 3х – 5 = 0;
г) х2 + 3x +5 = 0.
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