X^2 + x + 1 + 3x^2 + 3x + 2. Just combine the like terms:
x^2 + 3x^2 + x + 3x + 1 + 2
4x^2 + 4x + 3. <--- the sum.
The answer is -4,0 4,8 because u would solve for one variable in one of the equations and then substitute the result into the other
The answer to this is a=3