a. 3 b. -18 c. 3 and 18 11. Which of the following expression is polynomial? a. 2x2 b. 14x-2 c. 11 - 17 12. Evaluate 2x + 3 where x = 2. a. 2 b. 4 c. 7 13. Add (8x) and (2y + 6). a. 8x + 2y + 6 b. 10xy + 6 c. 8x + 8y 14. Find the difference of (40ab + 7a2b2) - (9ab - 11a2b2). a. 31ab + 4a2b2 b. 31ab- 18a2b2 c. 31ab-4a2b2 15. Simplify a. x4y4 x²,10 x3y6 b. x10y16 c. x17yº 16. Find the product of (x + 2) and (x + 3). a. 2x2 + 6x + 6 b. 2x2 + 5x + 6 C. X2 + 6x + 6 6x3 + 9x4 + 12x2 7. Divide: a. 2x5 + 3x6 + 4x4 3.x2 b. 2x6 + 3x8 + 4x4 c. 2x + 3x2 + 4