Respuesta :

y=-x^2-2x+6 
To find the vertex I'm going to use the axis of symmetry formula: 
x=-b/2a 
x = 2/-2 
x = -1 
To find the y-value I'm going to plug in the x value in the above equation 
y=-(-1)^2-2(-1)+6 
y = -1+2+6 
y = 7 
The vertex is : 
(-1,7) 

:D :D :D 

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