Lines and circles having rational operations

[bluemoon2188]

Hi all,

I am not sure if this is the right place to ask but I have two problems which I require enlightenment. The questions are,

1) Show that the intersection of two lines can be computed by rational operations.
2) Show that the intersection of a line and a circle can be computed by rational
operations and a square root.

Any help is appreciated.

Thanks
bluemoon2188

 

[SteamKing]

You would have better luck posting this in one of the math forums.

 

[Studiot]

https://www.physicsforums.com/showthread.php?t=497862