Function y = ax & # 178; + BX + C (a ≠ 0) image vertex is (1,4) and C = 0, the triangle area formed by the intersection of the vertex of quadratic function and coordinate axis is__

Function y = ax & # 178; + BX + C (a ≠ 0) image vertex is (1,4) and C = 0, the triangle area formed by the intersection of the vertex of quadratic function and coordinate axis is__

Because the vertex is (1,4) and over (0,0)
So the image also passes through (2,0)
So the area is (1 / 2) * 2 * 4 = 4