Answer:

Step-by-step explanation:
Please see attached picture for full solution.
It's the graphs that don't touch the x-axis have complex roots. Roots are the points where the parabola touches the x-axis. A,C and E all cross/touch the x-axis so they have real roots.
non-real or complex root parabolas are: B, D, F
answer I got was x=6/139 or x=-0.0431655