When m is the value, the equations {y ^ 2 = 12x, y = 3x + m have two identical real solutions, and the solutions of the equations are obtained

When m is the value, the equations {y ^ 2 = 12x, y = 3x + m have two identical real solutions, and the solutions of the equations are obtained

If y ^ 2 = 12x, y = 3x + m, then (3x + m) ² = 12x9x & #178; + 6mx + M & #178; - 12x = 09x & #178; + 6 * (m-2) * x + M & #178; = 0, the equations have two identical real number solutions, that is, the discriminant of the above equation is equal to 0, so [6 * (m-2)] ² - 4 * 9 * M & #178; = 036 * (m-2) ² - 36m & #178