Preference

Question:

Which of he following is not equivalent to 25x2 = y2 - 4

  1. a.

    75x2 = 3y2 - 12

  2. b.

    25x2 = (y + 2)(y - 2)

  3. c.

    5x = y - 2

  4. d.

    x2 = (y2 - 4)/25

Answer: c
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