y=x^2-2x-3=(x-1)^2-4
对称轴就是x=1
猜你喜欢
- 1一列长180m的火车匀速通过一个铁路桥,测得火车完全经过所用的时间为半分钟,并且火车速度为72km/h,
- 2已知多项式x的平方-2x-1的值为5,求多项式2x的平方-4+1的值
- 3求有关中国象棋名言俗语
- 4一个直角三角形的周长是90厘米,三条边长之比是13:12:5,它的面积是多少平方厘米?
- 5Dose your sister often——— (play)games with you
- 6Dose your father buy birthday presents for you ___A.Yes,he does.B.Yes,my father does.
- 7( )Would you like to come to my house?
- 8_is your school from here It's about 3 kilometres_ A how long,far B how long,away C how far
- 9验证碳酸饮料中含二氧化碳
- 10It is important that we shoeld protect our environment【改为同义句】