Final answer:
To find the sum of the polynomials, subtract c from both sides of the equation x^2 + 3x + c = 7/4 + c. The sum of the polynomials is c = 7/4.
Step-by-step explanation:
To find the sum of the polynomials, we need to set up an equation.
x^2 + 3x + c = 7/4 + c
Next, we can combine like terms. Subtracting c from both sides of the equation, we get:
x^2 + 3x = 7/4
Therefore, the sum of the polynomials is c = 7/4.