二次函数的一般式化为顶点式用配方法化一般式为顶点式:(1) y=x23x+1 (2) y=2x24x (3) y=-3x25x+2 (4) y= x2-x+3 (5) y= x2+3x+ (6) y=5x23x71 17(7)y=x22x3 (8)y = 2x2 + 4x 7 (9)y = 2x 2 + 4x 3 (10)y = x2 + 2x 1 (11)y = x2 + x 1 (12)y = x2 + x 316(13)y=4x 2 8x3 (14)y = 4x2 + 4x 7 (15)y = x 2 4x 4 二次函数的一般式化为顶点式用配方法化一般式为顶点式:(1) y=x23x+1 (2) y=2x24x (3) y=-3x25x+2 (4) y= x2-x+3 (5) y= x2+3x+ (6) y=5x23x71 17(7)y=x22x3 (8)y = 2x2 + 4x 7 (9)y = 2x 2 + 4x 3 (10)y = x2 + 2x 1 (11)y = x2 + x 1 (12)y = x2 + x 316(13)y=4x 2 8x3 (14)y = 4x2 + 4x 7 (15)y = x 2 4x 4