alg2

1. Requesting guidance on Algebra-2 problems

Hello everyone. Attached are 2 pictures of the math i need help on. I already have the answer key. What I need are the steps/work. If you could post a picture with your steps written on paper that would be much appreciated. Even if you only know a few, anything helps. thank you, Peyton
2. Imaginary Numbers?

I don't understand these math problems and i have get them done by tomorrow. btw they are imaginary numbers, so i squared is replaced with 1, i believe. (7+7i)^2 2i/1+2i -6+4i/1+4i Thanks so much in advance.(Clapping)
3. advanced alg2 (early college alg) problem

problem is under urgent homework help. i double posted (unaware i shouldn't have) plz answer there (asuming this post is not delted) \sqrt{x+a} + \sqrt{x - a} = \sqrt{2} \sqrt{x+7}
4. alg2

hey i need help with this one math problem in algebra 2 it says "find the sum of the numbers 1-500" now obviously they don't mean for you to begin adding numbers from 1-500 cuz that would take all year, anyone have any ideas on what they might want here? plz help if u can :D