Explain question number 4 i am having trouble understanding it. * puts saying this is algebra 1. good ! ☺️

If you are familiar with the formula a+b= a2+2ab+b2, this will help you. You have to work backwards and find the common factors. Watch you tube videos and it will show you a x method, where you cross multiply. It is too sophisticated to explain while typing, but hope this will help

Land elevations I’m pretty sure. I was pretty good in history back in the day.