What is the vertex of $f(x)=x^2-2x-3$ ?

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Answer 1 · 2015-04-12T20:03:51

You can complete the square like this: $f(x)=x^2-2x-3=x^2-2x+1-1-3=(x-1)^{2}-4$ to see that the vertex is at the point $(x,y)=(1,-4)$ .

What is the vertex of f(x)=x^2-2x-3f(x)=x^2-2x-3?