•A message appears to let you know when there is no solution or when there are infinite solutions. Pressing A or = will return to the Coefficient Editor.

Changing the Current Equation Type Setting

Press N5(EQN) and then select an equation type from the menu that appears. Changing the equation type causes the values of all Coefficient Editor coefficients to change to zero.

EQN Mode Calculation Examples

x + 2y = 3, 2x + 3y = 4

 

 

N5(EQN)1(anX + bnY = cn)

 

 

Math

 

1 =2 =3 =

 

 

2 =3 =4 =

 

 

 

 

 

=

(X=)

–1

c

(Y=)

2

 

 

 

x – y + z = 2, x + y – z = 0, –x+ y + z = 4 N5(EQN)2(anX + bnY + cnZ = dn)

1 =-1 =1 =2 = Math 1 =1 =-1 =0 =

-1 =1 =1 =4 =

 

=

(X=)

1

 

c

(Y=)

2

 

c

 

(Z=)

3

 

 

 

 

 

 

 

2x2 – 3x – 6 = 0 B

 

 

 

 

 

 

N5(EQN)3(aX2 + bX + c = 0)

3 + 57

 

2 =-3 =-6 ==

(X1=)

 

 

 

4

 

 

c

(X2=)

 

3 –

 

 

4

 

 

 

 

 

 

c

(X-Value Minimum=)*

 

 

 

3

 

 

 

 

4

 

 

 

 

 

 

 

c

(Y-Value Minimum=)*

 

–

57

 

 

 

 

 

 

 

 

8

 

*The local minimum value is displayed when a 0. The local maximum value is displayed when a 0.

x2 – 2'2 x + 2 = 0 B

N5(EQN)3(aX2 + bX + c = 0)

1 =-2!2 )=2 == (X=) '2

E-36