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.