Sharp EL-9900 - Manual (Page 92)

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Chapter 5: Advanced Calculations — Advanced Keyboard
B SYSTEM With this tool, linear equations containing up to 6 unknown values
(i.e., ax + by + cz + du + ev + fw = g ) can be solved.
1. Press B to select B SYSTEM, and select the number of
unknown values. For example, press 2 if values x and y
are unknown.
2. In the next screen, an
equation ax + by = c is
displayed, with an entry
table for the known values —
a , b, and c.
3. Enter 2 sets of the known
values, as shown in the
figure. Pressing E at
each entry will store the
value, and sets the cursor at
the next entry area.
4. When done entering the
known values, press @
h. The calculation result
will be displayed on the next
screen.
Pressing C will bring back the previous entry screen.
5. To go back to the TOOL menu to perform another calculation,
press @ V.
C POLY This tool is designed so that quadratic (ax 2 + bx + c = 0 ) or cubic
(ax 3 + bx 2 + cx + d = 0 ) equation may be solved.
1. Press C to select C
POLY, and select the degree.
For example, press 2 if
a quadratic equation is
desired.
2. In the next screen, an equation ax 2 + bx + c = 0 is displayed,
with an entry area for the known values — a, b, and c.