Question: 2c - 5 = 9
Answer: c = 7
Differentiate the given solution:

Substitute
and
into the ODE:

and it's easy to see the left side indeed reduces to 0.
Answer:
A
B
C
Step-by-step explanation:
I think this is correct
Indefinitely many solutions is the answer to this problem. All real numbers are solutions. The answer was 0=0.