17. What is the sum of 2x24. 4x + 5 and 8x2 - 7x +9?
a. 10x2-3x + 14
b. 20x2 + 3x + 14
c. 10x2-3x - 14
d. 10x2 -7x + 1
18. Subtract 2x2 + 4x + 6 from 10x2 - 4x + 8.
a. 8x2 - 8x - 2
b. 8x2 - 2
C. 8x2 + 2
d. 8x2 - 8x + 2​