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6-85.

Use the correct method from problem 6-84 to change each of the following equations to graphing form. Then, without graphing, find the vertex and equation of the line of symmetry for each.


  1. Complete the square to find the equation.

    Use and to find the vertex and axis of symmetry.

    vertex:
    axis of symmetry:

  2. See part (a).


    vertex:
    axis of symmetry: