Is it bug? CAS solve function.

[compsystems]

in the following example if you see two different results.

HP-prime
solve(x^3-1.1*x^2-65.4*x+229.5=0,x) {-9.,5.00000000001,5.09999999999}

Xcas
solve(x^3-1.1*x^2-65.4*x+229.5=0,x) list[-9.0,5.0,5.1]