An expression is shown below:
10n^3 − 15n^2 + 20xn^2 − 30xn
part a: rewrite the expression so the gcf is factored completely.
part b: rewrite the expression completely factored. show the steps of your work

Mrs. avila is buying a wallpaper border to go on all of her kitchen walls. she wants to buy 5 extra feet of wallpaper border than she needs to be sure she has enough. she buys 55.5 feet of the border. the store owner selling the border uses the width of mrs. avila's kitchen to determine that the length of her kitchen must be 14.5 feet.