คู่มือผู้ใช้

3. 

 
  2x
2
+ x - 3 = 0, 


2  


(a = 2, b = 1, c = -3): 2
1 3


 
 


 



 
!


 
:
, (M-),
(STO) Pol, Rec 
 

4. 




 





 




 
 



 
 

 




(EQN) 
 



 
 EQN
 1: x + 2y = 3, 2x + 3y = 4
(EQN) (a
n
X + b
n
Y = c
n
)
1 2 3
2 3 4
(X=) -1
(Y=) 2
 2: x - y + z = 2, x
+ y - z = 0, -x + y + z = 4
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