Þáttun – Æfing 4.3 – Þættið

  1. 16x2 – 16x + 4x
  2. p2 – q2
  3. B2 – 9x2
  4. 16r2 – 1
  5. 36 – y2
  6. 25x2 – 4b2
  7. 9z2 – 25s2
  8. X4 – 9y2
  9. X6 – 1