1. Types of polynomials

2. Monomial An algebraic expression which contains only one term
is known as Monomial 
Example : 2x, 3x2, 4t, 9p2q, -8mn2

3. Binomial An algebraic expression which contains two terms
is known as Binomial 
Example 1 : 2x + 3x2 
It is a Binomial, because it contains two terms 2x and 3x2 
Example 2 : 9pq + 11p2q
It is a Binomial, because it contains two terms 9pq and 11p2q

4. Trinomial An algebraic expression which contains three terms
is known as Trinomial 
Example1: 2x + 3x2 - 5x3 
It is a Trinomial, because it contains three terms 2x, 3x2 and 5x3 
Example2: 12pq + 3x2 - 11
It is a Trinomial, because it contains three terms 12pq, 3x2 and 11 

5. Polynomial
An algebraic expression which contains more than three terms
is known as Polynomial
Example1: 14x3 + 35x2 + 4x + 24
It is a polynomial, because it contains four terms
14x3 , 35x2 , 4x and 24
Example2: 12x4 + 21x2y + 13xy2 + 4y4 – 13
It is a polynomial, because it contains five terms
12x4 , 21x2y , 13xy2 , 4y4 and -13

6. Try These Identify the types of polynomials: 2x2 + 4x 5x2 + 9x + 5 u2