Vertex and axis of symmetry

Determine the vertex and axis of symmetry of each quadratic equation

y=x^2-4x+1

y=1/2x^2-6x-2

y=2x^2-5

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...rtex, the top or bottom of the parabola, will be on this line at a height of y=c (which you get for y when you plug in x=b).

The work then, for those three equations, is to get them into the ...