HP 48gII - Manual (Page 122)

Page 2-64
‚O~ „t Q2™+5*~ „t+6——
‚Å0`
` (keeping a second copy in the RPN stack)
³~ „t`
Use the following keystroke sequence to enter the QUAD command:
‚N~q (use the up and down arrow keys, —˜ , to select
command QUAD) , press
@@OK@@ . The screen shows the principal solution:
Now, change the setting of flag 01 to General solutions: H@FLAGS@
@@OK@@ @@OK@@ . And try the solution again: ƒ³ ~ „t`
‚N~q (use the up and down arrow keys, —˜ , to select
command QUAD) , press
@@OK@@ . The screen now shows the two solutions:
Other flags of interest
Bring up once more the current flag setting by pressing the H button, and
then the
@FLAGS! soft menu key. Make sure to clear system flag 01, which was
left set from the previous exercise. Use the up and down arrow keys (—˜)
to move about the system flag list.
Some flags of interest and their preferred value for the purpose of the
exercises that follow in this manual are:
02 Constant → symb: Constant values (e.g., π) are kept as symbols
03 Function → symb: Functions are not automatically evaluated, instead
they are loaded as symbolic expressions.
27 ‘X+Y*i’ → (X,Y): Complex numbers are represented as ordered pairs
60 [α][α] locks: The sequence ~~locks the alphabetic keyboard
Press @@OK@@ twice to return to normal calculator display.
@ CHK@