SOLUTION: find the vertex, the line of symmetry, the maximum or minimum value of the quadratic function, and graph the function. f(x)=x^2-4x-1 Please help me solve.

Question 262790: find the vertex, the line of symmetry, the maximum or minimum value of the quadratic function, and graph the function.
f(x)=x^2-4x-1
Please help me solve.
Answer by drk(1908) (Show Source): You can put this solution on YOUR website!
First we must put this equation into vertex form. To do that we need to complete the square. I will jump right to vertex form as

Now, we have the vertex as (2, -5)
line of symmetry is the x-value of the vertex or x = 2.
Since the equation starts with (+), then the minimum will be at the vertex at (2,-5)
here is the graph

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