A football team tries to move the ball forward as many yards as possible on each play, but sometimes they end up behind where th
ey started. The distances, in yards, that a team moves on its first five plays are 2, 21, 4, 3, and 25. A positive number indicates moving the ball forward, and a negative number indicates moving the ball backward. 1). Which number in the list is the greatest? 2). What is a better question to ask to find out which play went the farthest from where the team started? 3). The coach considers any play that moves the team more than 4 yards from where they started a "big play." Which play(s) are big plays?
So since you know that x^2-1 is equal to (x-1)(x+1), you can figure that this factors to (y^2-x^3)(y^2+x^3) because you know how the difference of two squares formula, stated on the top line of this answer.
