Blank space to answer 1. Change the quadratic function y = - 2x2 (quadratic) + 4x + 3 to y = a (x + m) 2 + K 2. Quadratic function y = X2 (quadratic) + X-5 when the minimum value of independent variable x =, y is 3. It is known that the image of the quadratic function y = (m-2) X2 (quadratic) + M2 (quadratic, not explained) - m-2 of X passes through the origin, then M =. At that time, y increases with the increase of X 4. For the image of y = 2 (x-3) 2 + 2, the following statement is correct () A. The mark of fixed point is (- 3,2) B. the axis of symmetry is y = 3 C. When x is greater than or equal to 3, y increases with the increase of X. when x is greater than or equal to 3, y decreases with the increase of X 5. In the same coordinate system, make the image of y = 2x2 + 2, y = - 2x2-1, y = half X2, then they () A. It's all about the y-axis symmetry B. the vertices are all at the origin C. they're all parabolas, opening up D. they're all wrong 6. It is known that the intersection of a parabola and x-axis is a (- 2,0), B (1,0), and passes through point C (2,8) (1) Find the analytic formula of the parabola. (2) find the vertex coordinates of the parabola

Blank space to answer 1. Change the quadratic function y = - 2x2 (quadratic) + 4x + 3 to y = a (x + m) 2 + K 2. Quadratic function y = X2 (quadratic) + X-5 when the minimum value of independent variable x =, y is 3. It is known that the image of the quadratic function y = (m-2) X2 (quadratic) + M2 (quadratic, not explained) - m-2 of X passes through the origin, then M =. At that time, y increases with the increase of X 4. For the image of y = 2 (x-3) 2 + 2, the following statement is correct () A. The mark of fixed point is (- 3,2) B. the axis of symmetry is y = 3 C. When x is greater than or equal to 3, y increases with the increase of X. when x is greater than or equal to 3, y decreases with the increase of X 5. In the same coordinate system, make the image of y = 2x2 + 2, y = - 2x2-1, y = half X2, then they () A. It's all about the y-axis symmetry B. the vertices are all at the origin C. they're all parabolas, opening up D. they're all wrong 6. It is known that the intersection of a parabola and x-axis is a (- 2,0), B (1,0), and passes through point C (2,8) (1) Find the analytic formula of the parabola. (2) find the vertex coordinates of the parabola

1: - 2 (x-1) 2 + 5 {= - 2 (x2-2x) + 3 = answer} 2: x = - 0.5, y = - 21 / 4 {according to the fixed-point formula - B / 2a, the vertex is (- 0.5, - 21 / 4)} 3: M = - 2, x is less than 0.5 {bring (0,0) into M = - 2, after simplification, the same as the second question} 4: C {the symmetry axis is x = 3, and the opening is upward, so C is correct} 5: a {all three are y}