Expert: Sherman D. - 3/18/2008

Question
you have put the answer to
show that x-3 is a factor of x^3+2x^2-11x-12
but i am stuck to see how your answer makes sense?
3'|'1'2'-11'|'-12
''|'''3''15'|''12
-----------------
''|'1'5'''4'|'''0        

what does ' mean as sometimes you have 1,2 or 3 of these ' and what are the  lines for please
thank you very much
Carl Parry


Answer
if you are replying to what i wrote, then they don't mean anything, If i don't put some kind of symbol there that you won't miscontrude as something else, my work would be way off, let me show you. This is the same work, but without the ```, and by the way, they don't mean anything, its just because my work gets left aligned on this site.

3 | 1 2 -11 | -12
 |   3  15 |  12
-----------------
 | 1 5   4 |   0

When you replied, and copied and pasted the work i did, you will see how they are suppose to line up.