The area of a rectangular garden is 38 1/4 square meters. the width of the garden is 4 1/2 meters. find the length of the garden

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