What is the a aba abcba abcdcba thing called? ? in other words, 1 3 7 15 31 pattern?

1. find the area of the unshaded square 2. find the area of the large square 3. what is the area of the frame represented by the shaded region show

The graph of a function f(x)=(x+2)(x-4). which describes all of the values for which the graph is negative and increasing? all real values of x where x< -2 all real values of x where -2

Iwill mark ad braniless pls just evens