Grab the row or column
with the easiest numbers
in it... Column 1 looks
easy. |
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What we're going
to do is called "expanding about the first column."
Before we start,
we need a grid of
+'s
and -'s...
Always start with a
+
in the upper left corner and go every other one:
 |
I'll call this
our
"sign box." |
|
These are the ones that go along
with our column. |
 |
