Hi

y=-2x^2-8x+10

 axis of symmetry x=-b/2a: 

 vertex (-b/2a,y):

 y-intercept (c): (0,10)

 two other points: (1,0) (-5,0)

 Is the Vertex to this problem : (-2,18) Yes!

 Is the axis of symmetry to this problem x=-2 Yes! 



 

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