Texas Instruments Titanium TI-89, User Manual

Page: 250 / 977

Symbolic Manipulation 247
Finding Partial Expansions
With the
expand
(
„
3
) function’s optional var value, you can do a partial expansion that
collects similar powers of a variable.
Solving an Equation
Use the
solve
(
„
1
) function to solve an equation for a specified variable.
solve(
equation
,
var
)
Do a full expansion of
(x
2
N
x) (y
2
N
y)
with
respect to all variables.
Then do a partial expansion with respect to x.
Solve
x + y
N
5 = 2x
N
5y
for x.
Notice that solve displays only the final result.