Dearing Ted :
First, Thanks Your help last time!!!
But I have an another question now!! 
If we want to solve following equation, how can i do first??
 We want to solve X's and Y's value!!
X,Y>0 
 When we have two equation: 
 For example:
exp(X)+(Y*Y)=exp(1)+4
(X*X)+2Y=5
 Please help me!! And give me a reference to solve it!!
THANK YOU!!
                                   Huang


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