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12: The Equation Solver 165
File name : 17BII-Plus-Manual-E-PRINT-030709 Print data : 2003/7/11
++
−×
abc
def
Since a Solver equation appears all on one line, you must group the
numerator and denominator separately by using parentheses, such as
L1)J)7TDLA/HBGT"
Order of Calculations. Operations occur from left to right but do:
! Exponentiation first. For example,
1BJ\%87
is interpreted as A
×
B
3
= C. B is raised to the 3rd power and then multiplied by A. To
raise A
×
B to the 3rd power, write the equation as
L1BJT\%87
.
! Multiplication and division before addition and subtraction. For
example,
1)JD78#$
is interpreted as A + ( B/C ) = 12. To divide
the sum of A + B by C, enter the equation as
L1)JTD78#$
.
Parentheses. Parentheses override the above rules of priority. When in
doubt, use parentheses. It never hurts to use parentheses―even multiple
parentheses. (Do not use brackets or braces.)
For example, earlier (page 154) we used the equation
Next Forecast＝Old Forecast +
()
++ ×
%% %Old Forecast
100
ABC
,
which was entered into the calculator as
<HX:8E9A)L16)J6)76TD#((BE9A
.
×
A
BC
would be entered as
1DLJB7T&
×
+
×
BC
A
DE
could be entered as
1)JB7DLABHT&"