If the side length of a square can be represented by 2x + 10 and its area is 256 square units, find the value of x.

Question

anonymous · Answer

(2x+10)^2=256
4x^2 + 40x + 100 = 256
can you solve from there?

anonymous · Answer

I got this far but I am having problems what to do from here....having a mental block because I know it is something simple I am missing.

anonymous · Answer

i hate this problem...
um subtract 256 from both sides next
but I don't know what after that. ^^;

anonymous · Answer

me too.  you have to subtract 100 from both sides but then I can't remember how to get 4x^ +40x=156 ( I think)  ....solving for x

anonymous · Answer

I got this far but I am having problems what to do from here....having a mental block because I know it is something simple I am missing.