Hi,

Note: the vertex form of a Parabola opening up(a>0) or down(a<0),  

where(h,k) is the vertex  and  x = h  is the Line of Symmetry

f(x)= -2x^2-2x =     Note:  & 

V(-1/2,1/2),  Parabola opens Downward, line of symmetry is x = -.5



 

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