[Maxima] simplification problem

[David Billinghurst]

On 2/02/2012 12:14 AM, rene kaelin wrote:
> Dear Maxima users
>
> 3^0.5/(2-3^0.5) - (2*3^0.5+3)/(4-3)
>
> is simplified to
>
> -2.664535259100376e-15
>
> How can I simplify it to 0?
Use rational numbers, rather than floating point numbers:

(%i1) 3^(1/2)/(2-3^(1/2))-(2*3^(1/2)+3)/(4-3);
(%o1) sqrt(3)/(2-sqrt(3))-2*sqrt(3)-3
(%i2) radcan(%);
(%o2) 0