|
Finally,
for |
 |
: |
You know how this is
going to work...
Take
D...
|
 |
and
delete the column with the
z
guys... |
 |
Replace the column
with the "=
guys"...
So, our final answer is
Cramer's Rule is
great, but crunching a bunch of 3
x 3 determinants takes a long
time and there are only about 6 billion places to make mistakes.
On the other hand, doing elimination with messy fractions like these
can't be a pretty thing. The moral here is, if the numbers
aren't super clean, solving 3 x 3
is hard!
YOUR TURN (and good
luck!):
Solve using Cramer's
Rule:
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