I am not sure what is actually going on here, helping daughtet.
P(x)=4fortth - 7xthird + 66x - 72
Upside down division sign below.
4/ 1 -7 0 66 -72
-----------------
4 -12 -48 72
---------------
1 -3 -12 -48 72
-----------------
1 -3 -12 18 (o)=>4 is a zero of p(x)
xthird -3xsecond -12x + 18
1-3-12 18 I can't find a number that works here. I am not sure what I am supposed to be trying to do.
why it works is the Rational Root Theorem.
Mathwords: Rational Root Theorem