Problem A; has -2 and -4 as solutions, so this is incorrect.
Problem B; has 4 and -2 as solutions; so this is incorrect.
Problem D; has 1 + √7i and 1 - √7i as solutions, this is also incorrect
Which leaves us to problem C;
Problem C;
Factor x^2 + 2x - 8
(x - 2)(x + 4) = 0
Solve for x
x = 2, -4
Your answer is C. x2 + 2x - 8 = 0