Properties
Category
Finnish
Similar Topics
Statistics
Comments
2
Participants
2
Subscribers
27
Votes
1
Views
380
Share
Why can't I get two solutions from quadratics?
Answered
I teach science and it would be useful to see both (or all) numerical answers with one click in CAS. Sometimes I get them. Sometimes I don't. Sometimes GG adds x=1 on the line and shows just one answer. Sometimes it doesn't. I've been trying to use the command NSolve different ways and the buttons too. I just can't find a logic here.
Could anyone help me? What should I do to see both numerical answers for a quadratic?
Files:
gg sieppaus.PNG
 GeoGebra
 Help
 Partners

Contact us
 Feedback & Questions
 This email address is being protected from spambots. You need JavaScript enabled to view it.
 +43 677 6137 2693
© 2019 International GeoGebra Institute
Please post your .ggb file
These seem to work OK for me:
Note that if you specify a starting point (ie x=1) then you will get just one solution. Also you can try Solve() in Numeric mode rather than NSolve()If I enter only the equation without a command in text and press the NSolve button, GG adds x=1 on the line and I get only one answer.
If I use only ( and ) after the NSolve command, like Michael did, I seem to get two numeric answers every time.
So the problem is probably using [ ] and { }. They give me only one numeric answer (and GG doesn't add x=1 on the line).
If I enter Solve(4.5*10^4=((0.00499+x)*x)/(0.0501x)) and then click the "numeric/almost equals" button, then I get two numeric answers too but this is a bit confusing...
But okay. Have to just put in the commands with ( and ) then I guess. Thank you!
Comments have been locked on this page!