HP 40gs User Manual page 277

Step-by-Step Examples
Press to factor
2
5 ⋅
2
20 into .
Press to select
2
5 ⋅
2
and
simplify it.
Press to select
– 2 5
and
3 12
to exchange
– 2 5
.
Press to select
2 45
and
to select 45.
Press , select
FACTOR and press
.
Press to factor
2
5 ⋅
3
45 into .
Press to select
2
5 ⋅
3
and
simplify the selection.
Press to select
⋅
2 3 5
, and
to select
⋅
2 3 5 – 2 5
.
to
with
to
16-3