<PRE><B>Question 985692</B>


&lt;B&gt;False&lt;/B&gt; &amp;nbsp;&amp;nbsp;in the general case.


For example, &amp;nbsp;let &amp;nbsp;&lt;B&gt;A&lt;/B&gt;&amp;nbsp; be &amp;nbsp;2x3 matrix &amp;nbsp;(2 rows and &amp;nbsp;3 columns)&amp;nbsp; and &amp;nbsp;&lt;B&gt;B&lt;/B&gt;&amp;nbsp; be &amp;nbsp;3x3 matrix. 


Then you can multiply &amp;nbsp;&lt;B&gt;A&lt;/B&gt;x&lt;B&gt;B&lt;/B&gt;, &amp;nbsp;but you can not multiply &lt;B&gt;B&lt;/B&gt;x&lt;B&gt;A&lt;/B&gt;.


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