Monomials: An expression with only one term is called monomial.
Binomial: An expression with two unlike terms, is called a binomial.
Trinomial: An expression with three unlike terms, is called a trinomial.
(i) 7mn = monomial [ 1 mark ]
(ii) z2+z = Binomial [ 1 mark ]
(iii) 1+x+x2 = Trinomial [ 1 mark ]