查看occ.hw.Math 20220607的源代码 occ.hw.Math 20220607 0

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{{引文|上加下减变常量，左加右减自变量|唐老师|二次函数}}
==尝试作死的数学作业==
    y=2(x-1)^2-1  上  x=-1  (1,-8)  D  B  
y=a(x+b/2a)^2+(4ac-b^2)/4a
顶点坐标(-b/2a,(4ac-b^2)/4a)