2: x = -0.5, y =-2 1/4 {according to the fixed-point formula -b/2a, the vertex is (-0.5, -2 1/4)}.

3: m=-2, x is less than 0.5 when introducing (0,0) {m =-2, the same as the second question after simplification}.

4:C {the symmetry axis x=3, and the opening is upward, so C is correct}

5:A {All three images are deformations of the function y=x2, and there is no translation in the X direction, so A is correct}

6:A(X+2)*(X- 1)= 0 {From two equations that are easy to concentrate on the X axis, the equation brought in by (2,8) is 2(x+2)(x- 1)=0, and the coordinates from the intersection of the two X axes to the midpoint are (-)