Question 985478
#3:


{{{(x-(-4))(x-(-1))(x-6)}}}
{{{(x+4)(x+1)(x-6)}}}------multiply if you want.



#1:

<pre>

1    |    1    -2    4    k
     |          1    -1   3
     |___________________________
          1    -1   3    k+3

</pre>
{{{k+3=7}}} as specified.
{{{k=7-3}}}
{{{highlight(k=4)}}}