Time for another forum game. Rules are simple, I'll post a hard math question, the first to answer it correctly posts another question, and so on, and so on... Let's start off with an easy one. Convert the following to its simplest form: ((x-y)(x+y)+y^2)^0.5 Good luck EDIT: You can also show how each question are solved if you could.

((x-y)(x+y)+y^2)^0.5 = x Edit: Do you want to see work too? This is a great idea, its been years since my last math course and I don't use it enough in my work. Good practice!

Sorry for the delay, I didn't have time last night to come up with a new one. ((x-y)(x+y)+y^2)^0.5 First, FOIL and simplify the first part (or know the pattern): (x-y)(x+y) = x^2 + xy - xy - y^2 = x^2 - y^2 So then: (x^2 - y^2 + y^2)^0.5 = (x^2)^0.5 Then do a little exponent math (x^2)^0.5 = x^(2 * 0.5) = x^1 = x --------------------------------------------------------- Keeping it simple still, I know calculators can do this no problem, but you need to show your work! Next problem: Find the equation of a line (in slope-intercept form) that passes thru the coordinates (9,3) and (1,-2).

The next problem is the last line my last post, not a simplification problem, but finding the equation that represents a line instead:

Ondrej, would something like this attachment help? I put it into a form like what you would see in a textbook. Note that the decimals are represented with periods "0.5" and not commas "0,5".

Well, I was holding off to see if someone else would solve this one since I didn't want to come up with a new problem, but to move it along here is the answer