Соотнесите квадратные уравнения и их корни: x^-7x+6=0 x^=4 2x^+3x-14=0

1) X ^ 2 – 7 * x + 6 = 0;D = b ^ 2 – 4 * a * c = (- 7) ^ 2 – 4 * 1 * 6 = 49 – 24 = 25;X1 = (7 + 5) / 2 = 12 / 2 = 6;X2 = (7 – 5) / 2 = 2 / 2 = 1;Ответ: х = 6 и х = 1.2) X ^ 2 = 4;X ^ 2 – 4 = 0;(x – 2) * (x + 2) = 0;X – 2 = 0, x = 2;X + 2 – 0, x = - 2;Ответ: х = 2 и х = - 2.3) 2 * x ^ 2 + 3 * x – 14 = 0;D = 9- 4 * 2 * (- 14) = 9 + 8 * 14 = 121;X1 = (- 3 + 11) / 4 = 8 / 4 = 2;X2 = (- 3 – 11) / 4 = - 14 / 4 = - 7 / 2 = - 3,5.Ответ: х = 2 и х = - 3.5.