Across
- 3. (5c)²
- 5. 5x(x+4)
- 7. (7x)(8y)
- 8. 6x²(3x+9)
- 9. -4x(x2-4x+11)
- 13. (5x²+2x-3)+(-2x²+7)
- 15. 12x;x=8
Down
- 1. (5x+4)-(7x+2)
- 2. (3x²y+6xy+8)+(2x²y-2xy-11)
- 4. (10x²-4x+9)-(6x²+x-6)
- 6. (3x+4)+(7x-8)
- 10. (x+3)(x+5)
- 11. (9x+1)-(-2x+2)
- 12. (-4a^5)³
- 14. 3.14x²;x=8