i did it in 1 min 12 secs.
Expand the following using the 'perfect square rule'.
1. (x + 4)²2. (x + 1)²3. (x - 5)²4. (x - ½)²5. (6 - x)²6. (3x + 5)²7. (2y + 10)²8. (7x - 2)²9. (4y - 3)(4y - 3)10. (9x + 8)(9x + 8)