A binomial is an algebraic expression that has two non zero, unlike terms. 6b2+5a+c has three unlike terms, therefore it is a trinomial. 3x3 has only one term and is a monomial. 7xy+3c has two terms, 7xy and 3c. So, it is a binomial.
An expression 5x2+ 5x + 5 is a binomial.
Coefficient of 'b' in the expression 6b2 is ___.