In the interval [- 1,1], take any two points a and B, and the probability that the two points of equation x2 + ax + B = 0 are both real numbers is p, then the value range of P is___ ．

In the interval [- 1,1], take any two points a and B, and the probability that the two points of equation x2 + ax + B = 0 are both real numbers is p, then the value range of P is___ ．

The two equations x2 + ax + B2 = 0 are real numbers, △ = a2-4b ≥ 0, B < 14a2. In the plane rectangular coordinate system, the two coordinate axes are a-axis respectively. The inequality of b-axis indicates the area below the parabola. Calculate the area of the area enclosed by the parabola B = 14a2 and the line a = ± 1, B = 1, s ∈ (74,2) the area of the square enclosed by the line a = ± 1, B = ± 1 is 2 × 2 = 4. Then the probability of the two equations being real numbers PP = 4-s4 The probability range of two real numbers of equation x2 + ax + B2 = 0 is (12916), so the answer is: (12916)