I'm new in this forum and I have a problem on my 35S:

when I try to solve for the expression x^2-4 I always find only the

positive root (2) even if I give it two initial estimates like -3

and -1 very close to the negative root (-2).

This happens only trying to solve the expression directly from the

EQN list, if I define the expression in a program and I solve it

giving the same initial estimates, solve result is fine.This is my operation sequence in RPN mode:

I insert the expression in the EQN list:

[EQN] X^2-4 [ENTER] [C]

I store in the X variable the first estimate (-3)

3[+/-][STO][X][ENTER]

I store in the X register the second estimate (-1)

1[+/-][ENTER]

from EQN list I recall the expression and I solve it for the variable X:

result is always 2Could anyone explain me where I wrong ?

Thanks in advance and my best wishes for an happy 2012 to everybody.