二次函数y=a(x-h)^2的顶点坐标为(-1,0)h=-1y=a(x+1)^2图像过点A(-2,-1/2)-1/2=ay=-1/2(x+1)^2B(2,-2)代入得y=-1/2*3^2≠-2把点向左移1个单位，就过点B(2,-2)
1235+633.0156203413510
