Keys:
rxEQl
Q
3[r7s]
SflTsI
3§[1
R/S
Display:
Description:
ft?value
Starts
the
quadratic
equation program.
Btvalue
Stores
3
in
A.
C?value
Stores
5
in
B.
X=-2.1350
Stores
—3
in
C
and
calculates
the
first
value
of
X.
X=0.4684
Calculates
second
value
of
X.
Example 2. Find the roots of
3**
+ 5x + 3 = 0. Note that the only
differencebetween this problemand example 1 is the sign of C.If you
have already run example 1, all you have to do is change the sign
ofC:
Keys:
Display:
Description:
|R/S|
A73.0000
Resumes the program.
IR/Sl
B?5.0000
Keeps A.
|r/s|
C7-3.0000
Keeps B.
B|r/s|
R=-0.8333
Changes the sign of C
and
calculates
the
real
part of the complex
root.
R/SJ
1=0.5528
Calculates the positive
value of the imaginary
root.
Example
3. A ball is thrown straight up at a velocity of 20 meters
per second from a height of 2 meters. Neglecting air resistance, at
what time will it reach the ground? The accelerationof gravityis 9.81
meters
per
second2.
12:
Mathematics
Programs
195
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