대답: 꼭지점 # (2/3, -1 2/3)# 설명: 감안할 때 - # y = -3x ^ 2 + 4x-3 # (2) = (- 4) / (- 6) = 2 / 3 # #y = -3 (2/3) ^ 2 + 4 (2/3) -3 # #y = -3 (4/9) +4 (2/3) -3 # #y = (-12) / 9 + 8 / 3-3 = -1 2 / 3 # 꼭지점 # (2/3, -1 2/3)#