I believe that the missing letter would be E and S which would be in between S and T
20 can be divided by 2 twice, with 5 remaining
20 can be divided by 4 once, with 5 remaining
20 can be divided by 5 once, with 4 remaining
20 can be divided by 10 twice
20 can be divided by 20 once
hope this helps
Is C g(x) = -X^2 -3
This is the answer
