Þáttun – Æfing 4.5 – Þættið

  1. x2 + 7x + 12
  2. x2 – 5x + 6
  3. x2 + x – 30
  4. 3x2 +21x + 18
  5. x2 – 7x – 30
  6. x2 + 11x + 28
  7. x2 – x – 30
  8. 2x2 + 5x – 12
  9. 6 + 9x + 3