Faster AS with less lines?

hey
im curious about one thing…
Which is better or is there a difference ( speed and processor consumption wise ) between writing
[AS]x=1;
x=x+1+x*x;

or

x=1;
x=x+1;
x=x+x*x;
[/AS] this is offcourse a simplified version and could be made much more complex…
but things add up. after a while maybe there are 20 lines of code which could be made redundant by compacting the lines…

so question is … Does it make a difference? (besides maybe easier to read)

//VoS