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TI-83 Plus Activities 543
To save keystrokes, you can recall the last expression you entered, and
then edit it for a new calculation.
4. Press
y
[
(above
Í
) to recall the
fraction conversion entry, and then press
y
[
again to recall the quadratic-formula
expression,
a
acbb
2
4
2
−+−
5. Press
}
to move the cursor onto the
+
sign in
the formula. Press
¹
to edit the quadratic-
formula expression to become:
a
acbb
2
4
2
−−
−
6. Press
Í
to find the other solution for the
quadratic equation 3X
2
+ 5X + 2 = 0.
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