Texas Instruments TI-83 PLUS - Manual (Page 546)

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
ac b b
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
ac b b
2
4 2
− −
−
6. Press Í to find the other solution for the
quadratic equation 3X 2 + 5X + 2 = 0.