1.   Which equation is in quadratic form?
    A. 3x3 + 3x + 3 = 0 B. x4 - x2 + x - 1 = 0
    C. D.
    Hint
  2.   Solve y4 - 18y2 + 81 = 0.
    A. 3, 3i B. 3
    C. -3, 3, -3i, 3i D. -3, 3
    Hint
  3.   Write the expression in quadratic form.
    A. B.
    C. D.
    Hint
  4.   Solve
    A. Solutions are –1, 1, and 3125. B. Solutions are 1 and .
    C. Solutions are 1 and 3125. D. Solutions are –1 and 3125.
    Hint
  5.   Solve x4 – 625 = 0
    A. B. 5, 5i
    C. D.
    Hint

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