Enter the values for the highlighted variables to complete the steps to find the sum 2/x^2-36 - 1/x^2+6X = 2/(X+6)(X-6) - 1/X(X+A)

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