根据题意设y=a(x+1)2-3,
将(0,-5)代入得:a-3=-5,
解得:a=-2,
则抛物线解析式为y=-2(x+1)2-3=-2x2-4x-5.
故答案为:y=-2x2-4x-5
已知抛物线的顶点为(-1,-3),与y轴的交点为(0,-5),则此抛物线的解析式是_.
已知抛物线的顶点为(-1,-3),与y轴的交点为(0,-5),则此抛物线的解析式是______.
数学人气:284 ℃时间:2019-10-19 15:15:58
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