Watch david dobrik he's funny but inappropriate so i don't recommend for kids

there are no choices you just explain the significance of the following points on the line.
worth 9 points. and brainliest if answer is correct.

Astudent draws two parabolas both parabolas cross the x axis at (-4,0) and (6,0) the y intercept of the first parabolas is (0,-12). the y intercept of the second parabola is (0,-24) what is the positive difference between the a values for the two functions that describe the parabolas