х^2 - 6х + 8 = 0;
D = b^2 - 4ac;
D = (- 6)^2 - 4 * 1 * 8 = 36 - 32 = 4; √D = 2;
x = (- b ± √D)/(2a);
x1 = (6 + 2)/2 = 8/2 = 4;
x2 = (6 - 2)/2 = 4/2 = 2
х^2 - 6х + 8 = 0;
D = b^2 - 4ac;
D = (- 6)^2 - 4 * 1 * 8 = 36 - 32 = 4; √D = 2;
x = (- b ± √D)/(2a);
x1 = (6 + 2)/2 = 8/2 = 4;
x2 = (6 - 2)/2 = 4/2 = 2