9. (X + 8)^2 - 5 = 0

Me because some of question i don’t understand

Can someone me and plz do the problem

Liz is shipping a package to her friend.the maximum weight of a medium flat-rate box is 20 pounds,including the box which weighs 6 ounces.write and solve an inequality to describe the possible weight ,w, of the contents that liz will ship to her friend if she must use a medium flat-rate box.