what are some challenges about working with rational expressions?

Question

Math is a language. Getting it precisely right is a lot easier than describing it in a vague statement in English such as you ask. Is there a chance you can change teachers? If so, I recommend it. THe focus of math ought to be math, not describing nor writing about ones feelings about math.

i would change teachers but they don't have anymore that are in algebra she is the only one. Is there anyway you can explain to me the importance of polynomials and the challenges about working with rational expressions in terms where i can understand it.