Question

http://awesomescreenshot.com/06c2cjhx5e

Answer 1

You could either solve it by squaring both sides or by just simply using the options.

Answer 2

I got all the way down to \[5x + 5 - 2 \sqrt{x(5x + 5)} + x = 9\] and got stuck

Answer 3

why not just substitute in since its a simple problem? Find one that works then test if any other answers work.

Answer 4

x=4

Answer 5

Roberto dont just give the answer you have to lead them to it