Question 1002232
<pre>

3   |    1    -7    17    -15
    |          3    -12    15
    ____________________________
         1    -4    5      0
</pre>

Quotient is the quadratic factor {{{x^2-4x+5}}}, which factorizes to become {{{(x+1)(x-5)}}}.


Complete factorization of the function is  {{{f(x)=(x-3)(x+1)(x-5)}}}.


The two other roots are  -1, and +5.