Þáttun – Æfing 4.4 – Þættið

  1. A10 – B8
  2. 12x2-75b2
  3. 20a2 – 45b2
  4. 16y2 + 32y + 16
  5. 8z2 – 16z + 8
  6. 12x2 – 36ax +27
  7. r2 + 2rs + s2 – t2
  8. p2 – 2pq + q2 – x2
  9. a2 – c2 – 2ab + b2