Sharp EL-9900 - Manual (Page 33)

12
Basic Keyboard/ALGEBRA USING THE SHARP EL-9900
Copyright © 2002, Sharp Electronics Corporation. Permission is granted to photocopy for educational use only.
1. Press Y= CL to return to and clear the Y1 prompt.
2. To enter the polynomial y = –5x 2 –3x + 1, press (–) 5 x x 2 – 3
x + 1 .
3. View the graph in the decimal viewing window by pressing ZOOM
A (ZOOM) 7 (Dec).
4. Press TRACE and move cursor to the left of the left-hand root. Press 2ndF
CALC to view the calculate menu.
5. Press 5 (X_Incpt) to find the left-hand root.
6. Press 2ndF CALC 5 (X_Incpt) to find the next root.
JUMPING TO FIND ROOTS