Which quadratic function has one real solution?

0 = 2(x + 7)(x – 5)
0 = (x – 3)(x – 3)The quadratic function f(x) = –x2 – 6x – 8 is graphed.


What are the solutions of the quadratic equation 0 = –x2 – 6x – 8?

2 and –4
–2 and 4
–2 and –4
2 and 4

0 = 2.4(x – 2)(x + 2)
0 = (x – 2)(x – 1)