|
|
|
|
|
|
by gnicholas
1002 days ago
|
|
|
In the US, students were allowed to use the TI-89, but not the TI-9X, which. Had a QWERTY keyboard but was otherwise identical. The 89 could solve equations, but the 85 and 86 could do the same, if you inputted them in standard form (y = mx + b). It could also solve simultaneous equations, again if you standardized the formatting. This was definitely a useful feature, beyond what scientific calculators could do. |
|
|