A point of intersection (6,0) between the image of quadratic function and x-axis, and the vertex is (4, - 8), a point of intersection (6,0) between the image of quadratic function and x-axis,
Let y = a (x-4) ^ 2-8 substitute (6.0) to get a = 2, so the equation is y = 2x ^ 2-16x + 24
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- 1. It is known that the vertex coordinates of the image of the quadratic function y = x2 + BX + C are (1, - 4), and the intersection point with the Y axis is a.1. Find the relationship of the quadratic function and the point a coordinates (3) If two non coincident points whose coordinates are (m, n) and (n, m) are on the image of the quadratic function, the value of M + n is obtained (4) If the quadratic function intersects with the negative half axis of X axis at point B, C is a point on the function image, D is a point on X axis, when the quadrilateral with a, B, C, D as the vertex is a parallelogram, please write the area of the parallelogram directly The key is the fourth question~
- 2. When x = 3, the minimum value of y = - 1, and the image is over (0,7), the analytic expression of quadratic function about X is obtained
- 3. When x = 3, the minimum value of y = - 1, and the image is over (0,7), the analytic expression of quadratic function of Y with respect to X is obtained
- 4. Given that the image of a quadratic function passes through a point (0,1), and when x = - 1, there is a minimum value of - 2, find the analytic expression of the quadratic function
- 5. The image passes through a (- 1,0), B (3,0), and the function has a minimum value of - 8. What is the analytic expression of this quadratic function?
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