I am too rusty in algebra.
I have as input in a program numbers $a$ and $b$.
I am trying to find them using the below relation:
$a + b = X$ $ab=Y$
and $X$ and $Y$ are known numbers in my program.
I can't remember how to derive $a$ or $b$.
I get something like $a^{2}-aX+Y=0$ but cant't remember how to make it so that it is something like $a=....$ ; an $b=....$ ; in my program.
Any help please?