Simplifying the uniform electric field equation

[Goatscholar18]

Homework Statement

[/IMG]

Homework Equations

See Below

The Attempt at a Solution

Maybe my answer is right but not simplified enough. But if it is I am having trouble seeing the mathematical equivalency. Please help.

Thanks in advance!

 

[mfb]

Most of that is hard to read, but if you just ask about the answer: Factor out 1/4 in the square root and then get it out of the square root.

 

[TSny]

Also, I don't think you kept track of the factors of a/2 circled below