Plz me with number 9 and show work so i can understand thx

Ineeeeed this is due tomorrow and i dont know the answer can you find all the exponents

Write the expression in complete factored form. 5n_(c - 3) - n(c - 3) =

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (–4, 0) and (6, 0). the y-intercept of the first parabola 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? write your answer as a decimal rounded to the nearest tenth