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Problem With Solving 2 Equations

Classpad

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#1 xavierklavier

xavierklavier

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    Casio ClassPad 300PLUS

Posted 24 April 2015 - 01:42 PM

Hi everyone

 

I want to solve an easy exercise with 2 unknown and 2 equations.

 

x+y=5

x*y=5

 

I try to solve it with the function in the 2D menu (it looks like beneath).

 

{  x+y=5   I

{  x*y=5    I x,y

 

It normally works, but now the calculator (Casio Classpad 300Plus) gives me the solution:

 

{x+y=5,x*y=5}.

 

So it does not solve the equations. 

I own this calculator since more than 6 years and I never had this problem before.

 

Does somebody has some ideas how to solve the problem?

 

thank you


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#2 ACLIM

ACLIM

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    AFX. 2.0 CLASSPAD 330

Posted 29 April 2015 - 08:30 PM

solve your problem follows

 

 

solve({x+y=5,x*y=5},{x,y}

 

x=1.381966011

y=3.618033989

 

Classpad 330 Vr. 3.06







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