Forgot how to solve quadratic equations.

use these for example:
(x+4)(x+4)

(d+7)(d+1)

Can someone be awesome and me with : (

Given the box plot, will the mean or the median provide a better description of the center? box plot with min at 10.5, q1 at 11.5, median at 12.5, q3 at 13.5, max at 15

Find the solution set of this inequality. select the correct graph. |8x+16|> 16