I'm having trouble with Ax=b matrices. I get really confused when dealing with matrices that have a different number of rows from columns. An example is this problem:(adsbygoogle = window.adsbygoogle || []).push({});

(A is a 3x2 matrix)

A =

3 1

4 2

-5 -1

(b is a 3x1 matrix)

b =

1

0

-3

I need to find the solution set for x. Aren't there only 2 variables?

Thanks.

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# Having difficulty with an Ax=b problem and understanding it

**Physics Forums | Science Articles, Homework Help, Discussion**