Question 230380
<pre>
-2  |   1   7   4  0
    |
    ---------------------

</pre>   


<pre>
-2  |   1   7   4  0
    |
    ---------------------
        1
</pre>  



<pre>
-2  |   1   7   4  0
    |      -2
    ---------------------
        1   5
</pre>     



<pre>
-2  |   1   7   4   0
    |      -2  -10  12
    ---------------------
        1   5  -6  12
</pre>    


Answer: P(a)=12