Þáttun – Æfing 4.1 – Þættið

  1. 5a – 15
  2. 9x – 3y
  3. 3bq – 12cq
  4. 6b – 9p2
  5. arb + arc + adr
  6. 8pq – 4pr + 4p2
  7. 8x3v + 12x2v2 + 16xv3
  8. xa +bx + ay + yb
  9. ax +2av – bx – 2by