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Math (URGENT)

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How to graph this:

Step 0: y=x(x-4)
Step 1: y=x^2-4x
What's next?

Calculator shows vertex at (2,-4)
I asked before, but I'm still stuck. Please help. thanks.

  • Math (URGENT) -

    I answered before, by completing the square, and told you why the vertex is at (2, -4).
    Why don't you just plot the curve yourself?

  • Math (URGENT) -

    I understand why the vertex is there, I just don't understand what you mean by completing the square.

  • Math (URGENT) -

    http://www.themathpage.com/alg/complete-the-square.htm#complete

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