It is known that the vertex coordinates of the quadratic function y = f (x) are (- 32,49), and the difference between the two real roots of the equation f (x) = 0 is equal to 7

It is known that the vertex coordinates of the quadratic function y = f (x) are (- 32,49), and the difference between the two real roots of the equation f (x) = 0 is equal to 7

Let y = a (x + 32) 2 + 49, let y = 0, we can get AX2 + 3ax + 94A + 49 = 0, ∧ X1 + x2 = - 3, x1 · x2 = a + 4 × 494A, ∧ x1-x2 | = (x1 + x2) 2 − 4x1x2 = 9 − 9A − 49 × 4 = 7, the solution is a = - 2369