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There is a point $M (2,1$) on a Cartesian coordinate system. There is also a point $P (x,y)$. What is the distance $MP$ in $x$ and $y$?

I can figure out that $ PM^2$ = $(x-2)^2 + (y-1)^2$, at least, I think so, but how to solve $PM$? I am not the biggest fan of algebra so..

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1  
Take the square root... –  copper.hat Sep 13 '12 at 19:03
    
I know that, but I don't exactly know how to or even if it is the correct answer. –  JohnPhteven Sep 13 '12 at 19:04
    
that's right... –  HipsterMathematician Sep 13 '12 at 19:05
1  
Well, the formula you have for the distance squared between $M$ and $P$ is correct. The formula for the distance involves taking the square root. Until you have specific value for $x,y$ you can't do much more... –  copper.hat Sep 13 '12 at 19:07
4  
$\sqrt{(x-2)^2 + (y-1)^2}$. That is the simplest form to write it in, and it is the correct answer. –  Isaac Solomon Sep 13 '12 at 19:13

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