1. a = 3 ,  b = 1
2. 
3. n =1 , m = ½

1. 16c² + 9d² + 4e² + 24cd – 16ce – 12de
2. –225x⁴ + 270x²yz – 81y²z²
3. 64x² – 4y² + 20yz –25z²
4. 
5. 64s³x³ + 216t³y³
6. b³ + 16b² + 67b +141
7. 474,552
8. 25a² – 4b² – 12bc – 9c²
9. h⁶ – 15,625
10. 

1        - (x – y + z)(3c – 7d)

2       

3         -3(j - k)(5j - 5k - 1)

4