HP 39gs Master Manual page 349

We can now use the
LINSOLVE
second linear equation is still highlighted, fetch the
command from the
highlight the linear expression again as shown right.
Now, while the entire expression is highlighted, as shown above, press
to obtain the '
SHIFT (-)
If yours looks like the version shown to the right then the error has been
caused by not having the whole expression highlighted before pressing
. Press to remove the
AND DEL
The other equation is still available from the CAS History. Begin by ensuring that no part of the current
equation is highlighted and that the cursor is positioned where you want the new equation, immediately after
the . If any portion of the expression in the editor is highlighted when you perform an
AND
be replaced by the expression being echoed.
To fetch it, press
SYMB
cursor.
We can then finish off the
position and then entering "
function to find A and B. While the
menu. Then press
'. The result should be as shown right.
AND
, then do it properly.
AND
and highlight the required equation. Pressing
command by pressing right arrow to move to the second parameter
LINSOLVE
". At that point we can press
A AND B
LINSOLVE
and to
ENTER
349
then it will
will echo it to the point of the
to obtain the values of
A
and .
B