Casio FX-115ES-S-IH User Guide - Page 32

Example SOLVE Operation

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• An error (Variable ERROR) occurs when the solution variable is not included in the expression being solved. k Example SOLVE Operation Example: To solve y = ax2 + b for x when y = 0, a = 1, and b = -2. MATH Math Sf(Y)Ss(=)Sy(A) S)(X)w+Se(B) 1)(,)S)(X) Math 1s(SOLVE) Prompts for input of a value for Y. Current value of Y Math 0= Math 1= Math y2= Current value of X Math = Solution Screen • To interrupt an ongoing SOLVE operation, press A. Precautions when Using SOLVE • SOLVE may not be able to obtain a solution because of the initial value (assumed value) of the solution variable. If this happens, try changing the initial value of the solution variable. • SOLVE may not be able to determine the correct solution, even when one exists. E-30

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E-30
• An error (Variable ERROR) occurs when the solution variable is
not included in the expression being solved.
k
Example SOLVE Operation
Example:
To solve
y
=
ax
2
+
b
for
x
when
y
= 0,
a
= 1, and
b
= –2.
MATH
S
f
(Y)
Ss
(=)
S
y
(A)
S
)
(X)
w
+
S
e
(B)
1
)
(,)
S
)
(X)
1s
(SOLVE)
Math
Prompts for input of a value for Y.
Current value of Y
0=
Math
1=
Math
y
2=
Math
Current value of X
=
Math
Solution Screen
• To interrupt an ongoing SOLVE operation, press
A
.
Precautions when Using SOLVE
• SOLVE may not be able to obtain a solution because of the initial
value (assumed value) of the solution variable. If this happens, try
changing the initial value of the solution variable.
• SOLVE may not be able to determine the correct solution, even
when one exists.
Math