If you drive exactly 10 miles south then make a left turn and drive exactly 24 miles east how far are you ,in a straight line from your starting point?

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