4.3 Due February 8

Difficult)))
This section really helped me to clarify the understanding of what a unit is, and how to use the definition along with zero divisors to build up a concept of prime polynomials, or irreducible nonconstant polynomials.



Reflective)))
What is an example of an associate that doesn't commute.
Rather:
given "a" in a ring R where R is a commutative ring with identity where a=bu for some unit u, and some element b in R, then what is an example where b = a(u^(-1)) does not hold?????