Together, dulcina and hannah have 78 refrigerator magnets. hannah has 2 times as many refrigerator magnets as dulcina. how many refrigerator magnets are in hannah's collection? how many refrigerator magnets are in dulcina's collection?

Polynomials are not closed under division.for example, if we divide the polynomial with the polynomial  , we get    which is not a polynomial expression. there are variables in the denominator, it is not written as just terms, etc. the expression is also undefined at x = 3 because that results in a division by zero. polynomials do not have any undefined values.