1, because the image is symmetrical about x=2 and passes through (1, 0), it must pass through the point (1, 0) which is symmetrical about x=2 (3, 0).

2. Because it is symmetrical about x=2, the vertex must be on a straight line with x=2. Bring (1, 0) and (3,0) into Y = X+BX+C, and solve the equations with b=-4, c=3 and Y = X 2-4x+3. If x=2 is brought in, y=- 1 is obtained, so the vertex is (2,-1).

3. Bring in x=0 and get y=3, so the intersection with Y axis is (0,3).

4. The image of this formula is a parabola about x=2 in the symmetrical direction, that is, x; 0, so when x

So 1, 3,4 is correct.