Determine which consecutive integers do not have a real zero of f(x) = x2 + 5x2 - x - 6 between them.
a (65)
c. (-2,-1)
b. (-5, 4)
d. (1,2)

18

step-by-step explanation:

draw the shape and you will see that f and k are actually at adjacent vertices (points of the hexagon that are neighboring).   so find the distance between (1,2) and (4,2).   that is easy since (1,2) and (4,2) is just a vertical distance to count, which is 3.   it is a regular polygon which means all sides are congruent.   you have 6 sides (hexa) so multiply 6 by 3 to receive 18.

i think it might be a but you might want a second opinion