How can i find the vertex of -x^2+2x-4?

I also need help on completing the square if factoring is impossible.
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1 Answer

-x^2 +2x -4...parabola that kerv down

take derivativ...-2x+2 & set it tu zero tu find weer tangent is horizontal

-2x+2=0 at x=1

gotta be the hi point (er kerv)
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