I have an Algebra FX 2.0 Plus and am trying to use the solve function to solve the following equation:
x^2 + x + 1 = 0
I know it has no real roots but the calculator should give me the imaginary roots. I have the Complex mode set to a+bi. I get the "Can't Solve!" error no matter what starting point I try. Does this work on anyone else's FX 2.0 Plus calculator?
solve(x^2+x+1,0)
Tom Lake
Solve function on Alg FX 2.0 Plus
Started by
TomL_12953
, Apr 15 2003 05:39 PM
7 replies to this topic
#1
Posted 15 April 2003 - 05:39 PM
#2
Posted 15 April 2003 - 06:17 PM
you may have complex mode set to a+bi in normal mode, but the calc has a diffrent setup in cas and algebra mode, hit CTRL' />+F3' /> while in Cas/Algebra then go to answer type and hit F2' />.
#3
Posted 15 April 2003 - 07:29 PM
You have a syntax error..
try:
try:
Solve(X^2+X+1=0,X) //Solve( expression, variable to solve for ), defualt var is X so it can be omitted
#4
Posted 15 April 2003 - 08:39 PM
thats not a sentax error, I got it to work on my calc by doing what I said.
#5
Posted 15 April 2003 - 08:45 PM
he wrote "solve(x^2+x+1,0)"
in CAS mode, this is syntax error
in Comp mode, it's not, but you can't imaginary roots in comp mode (approximiation, by Newton/Raphson if I'm not wrong)
for numerical solving he could use the equation program..
in CAS mode, this is syntax error
in Comp mode, it's not, but you can't imaginary roots in comp mode (approximiation, by Newton/Raphson if I'm not wrong)
for numerical solving he could use the equation program..
#6
Posted 15 April 2003 - 08:51 PM
oh, ok I didn't see the second equation he wrote, i was looking at the first one.
even so the equation will evaluate to no solution unless he does as I said and swicthes to complex mode.
even so the equation will evaluate to no solution unless he does as I said and swicthes to complex mode.
#7
Posted 16 April 2003 - 02:08 AM
use the simotanous solver
#8
Posted 16 April 2003 - 02:47 AM
Solving for x "...=0,x) gives x = +/-(sqr(3)i/2-1/2 in CAS.
If you try to solve x.x+x+1,0 the calc will give a syntax error. You need to tell it 1)What the expression is equal to and 2)Which variable to solve for.
And sorry for being pedantic but you can't have complex roots really, just factors of an expression
The solver only works with real roots unfortunately...
Oh you can also use rFactor(x.x+x+1) to give the complex factors. Have fun!
If you try to solve x.x+x+1,0 the calc will give a syntax error. You need to tell it 1)What the expression is equal to and 2)Which variable to solve for.
And sorry for being pedantic but you can't have complex roots really, just factors of an expression
The solver only works with real roots unfortunately...
Oh you can also use rFactor(x.x+x+1) to give the complex factors. Have fun!
0 user(s) are reading this topic
0 members, 0 guests, 0 anonymous users