9514 1404 393
Answer:

Step-by-step explanation:
See the attachment for the working out of the long division.
Answer:
4x² + 20x - 2
Step-by-step explanation:
To evaluate (c ○ d)(x), substitute x = d(x) into c(x)
c(x² + 5x)
= 4(x² + 5x) - 2
= 4x² + 20x - 2
The answer would be 21 because its the same length as the other side.