I know the answer is D.8 but I don't understand how...
Please explain?!
(prepping for the SAT so please don't ask me where my work is because I can't cheat on the test and I'm just trying to understand how every single problem is answered and what the process is to get the answer before I take the practice SAT again but I'd appreciate a walk through too)
THANK YOU ♥
http://awesomescreenshot.com/0153hov6f1

Question

I know the answer is D.8 but I don't understand how...
Please explain?!
(prepping for the SAT so please don't ask me where my work is because I can't cheat on the test and I'm just trying to understand how every single problem is answered and what the process is to get the answer before I take the practice SAT again but I'd appreciate a walk through too)
THANK YOU ♥
http://awesomescreenshot.com/0153hov6f1

anonymous · Answer

https://sites.google.com/site/unblockedgames77/battlefield-arena

anonymous · Answer

@patrick11279 sorry wut

anonymous · Answer

Any particular reason you gave me a gaming site...?

ganeshie8 · Answer

still here ?

ganeshie8 · Answer

Notice that  $\large (x+1)(x+3) = x^2 + 4x + 3 =  (x+2)^2-1$

anonymous · Answer

what does that have to do with (x+2^2=9 and sorry I was doing other practice questions

anonymous · Answer

x+2^2=9*

ganeshie8 · Answer

you know that (x+2)^2 = 9

so use that value to find the numerical value of (x+1)(x+3)

anonymous · Answer

Oh wait I understand it now. Thank you! @ganeshie8 c::