Solving quadratic inequalities

Lessons

• Introduction
  
  Solve:
  i)

  $x^2+2x-15=0$
  ii)

  $x^2+2x-15\leq0$
  iii) $x^2+2x-15$ $>$ $0$
  

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• 1.
  
  Solve:
  i)

  $-2x^2+x+3=0$
  ii)

  $-2x^2+x+3 \ge 0$
  iii) $-2x^2+x+3$ < $0$
  

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• 2.
  
  Solve:
  i)

  $x^2-10x+25=0$
  ii)

  $x^2-10x+25$ > $0$
  iii)

  $x^2-10x+25$ < $0$
  iv)

  $x^2-10x+25 \leq 0$
  

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