<PRE><B>Question 61964</B>
The given expression is: 


405x&lt;sup&gt;8&lt;/sup&gt; + 90x&lt;sup&gt;7&lt;/sup&gt;y + 5x&lt;sup&gt;6&lt;/sup&gt;y&lt;sup&gt;2&lt;/sup&gt; 


Taking 5x&lt;sup&gt;6&lt;/sup&gt; as a common factor throughout the above expression, we get: 


5x&lt;sup&gt;6&lt;/sup&gt;(81x&lt;sup&gt;2&lt;/sup&gt; + 18xy + y&lt;sup&gt;2&lt;/sup&gt;)


The above step can be kept as it is or further simplified as: 


5x&lt;sup&gt;6&lt;/sup&gt;[81x&lt;sup&gt;2&lt;/sup&gt; + y(18x + y)]


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