Casio fx-991ZA PLUS II User Manual page 65

Example 2: x - y + z = 2, x + y - z = 0, -x + y + z = 4
(EQN)
2
Example 3: 2x - 3x - 6 = 0 (MthIO-MathO)
* The local minimum value is displayed when a > 0. The local maximum
value is displayed when a < 0.
2
Example 4: - 2√2x + 2 = 0 (MthIO-MathO)
x
1
3 2
Example 5: x - 2x
(EQN)
1
(EQN) (a X + b
n
1 2
2 3
(a X + b Y + c
n n
1 1 1
1 1 1
1 1 1
2
(EQN) (aX + bX + c = 0)
2 3
2
(EQN) (aX + bX + c = 0)
2 2
- x + 2 = 0
3 2
(aX + bX + cX + d = 0)
2 1
64
Y = c )
n n
3
4
Z = d )
n n
2
0
4
(X
6
(X
(X-Value Minimum=)*
(Y-Value Minimum=)*
2
2
(X=) -1
(Y=) 2
(X=) 1
(Y=) 2
(Z=) 3
3 + √57
=)
1
4
3 - √57
=)
2
4
3
4
57
-
8
(X=) √2
(X =) -1
1
(X =) 2
2