HP 15c - Manual (Page 236)

236 Appendix D: A Detailed Look at _
Return to Program mode and add instructions to your subroutine to
eliminate the root just found.
Keystrokes Display
|¥ 000-
Program mode.
| ‚ |
‚ 026– 30 Line before n.
® 027– 34 Brings x into X-register.
l 0 028– 45 0
Divides by (x – a), where
a is known root.
- 029– 30
÷ 030– 10
Now use the same initial estimates to find the next root.
Keystrokes Display
|¥ 4.0000 -06
Run mode.
10
“ v –10.0000
Same initial estimates.
20
“ –20
´ _ 2 0.4000
Second root.
O 1 0.4000
Stores root for deflation.
) ) 0.0000
Deflated function value.
Now modify your subroutine to eliminate the second root.
Keystrokes Display
|¥ 000-
Program mode.
| ‚ |
‚ 030– 10
Line before n.
® 031– 34
Brings x into X-register.
l 1 032– 45 1
- 033– 30
Deflation for second root.
ч 034– 10