问题:
抛物线y=x 2-2x-1的顶点坐标是
A.(1,-1)
B.(-1,2)
C.(-1,-2)
D.(1,-2)
抛物线y=x 2-2x-1的顶点坐标是
A.(1,-1)
B.(-1,2)
C.(-1,-2)
D.(1,-2)
A.(1,-1)
B.(-1,2)
C.(-1,-2)
D.(1,-2)
参考答案: