Given that the image of quadratic function y = AX2 + BX + 4 intersects with X axis at a and B, two points intersect with y axis at C angle ACB = angle ABC AB = 5, find the analytic expression of the quadratic function

Because angle ACB = angle ABC, so AB = AC = 5, easy to get, OC = 4, so OA = 3, OB = 3 + 5 = 8
So C (0,4), a (3,0), B (8,0), you know

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