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Inequalities

Question

  1. Solve the inequalities of x2 + 12x – 13 > 0.
  2. Solve (x – 1)(2x2 – 7x – 15) > 0.
  3. Solve (x + 5)/(x – 12) > 0.

 

Guide: Factor completely all the equations and set it to zero.

Answer

  1. x < – 13, x > 1
  2. -3/2 < x < 1, x > 5
  3. x < – 5, x > 12

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