Final answer:
To decide the type of polynomial, the number of terms must be identified. In the expression given, with two terms present, it's a binomial, but if it were a single term due to a typo, it would be a monomial.
Step-by-step explanation:
To determine whether -2a23x4-73x4z2 is a monomial, binomial, trinomial, or other polynomial, we need to count the number of terms in the expression. A term is defined as a product of numbers and variables that are connected by multiplication or division, and separated from other terms by addition or subtraction.
In the given expression, assuming the "-" between -2a23x4 and -73x4z2 stands for subtraction, we have two terms: -2a23x4 and -73x4z2. Since there are two terms, it is a binomial.
However, if there was a typo and the terms are not separated by addition or subtraction, then the entire expression would instead represent a single term and thus be a monomial.