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16
Basic Keyboard/ALGEBRA USING THE SHARP EL-9900
Copyright © 2002, Sharp Electronics Corporation. Permission is granted to photocopy for educational use only.
Graphing a system of equations and using the calculate feature to
find the solutions
1. Turn the calculator on and press Y= .
2. Press CL to clear an old Y1 expression. Press ENTER CL to clear
additional Y prompts.
3. To enter the system of equations: y = x
2
– 1
y = 2x
press xx
2
– 1 ENTER 2 x . View the graphs by pressing ZOOM
A (Zoom) 5 (Default).
4. Press 2ndF CALC to access the calculate feature. Press 2 (Intsct).
The left-hand intersection will appear on the screen.
5. Press 2ndF CALC to access the calculate feature again. Press 2
(Intsct). The right-hand intersection will appear on the screen.
SOLVING A
SYSTEM OF EQUATIONS
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