Like terms have same variables

Unlike terms have different variables


Let’s look at some examples


2𝑥, 3𝑥

2𝑥 & 3𝑥 have the same variable 𝑥

So they are like terms


3𝑥 2 y, 2y𝑥 2

3x 2 y has variable 𝑥 2 y

2yx 2 has variable y𝑥 2 i.e 𝑥 2 y                      (As x 2 y = y𝑥 2 )

So, they are like terms


−4𝑥y, 3xy

−4𝑥y has variable 𝑥y

   3𝑥y has variable 𝑥y

−4xy and 3xy have same variable xy.

So, they are like terms.


4𝑥y, 3𝑥

4𝑥y has variable 𝑥y

3𝑥 has variable 𝑥

4𝑥y, 3𝑥 have different variables.

So, they are unlike terms.


21z, 39z

21z  has variable z

39z has Variable z

21z and 39z has same variable z

So, they are like terms.


8, 9

Since both 8 & 9 do not have a variable

∴ They are like terms


  1. Chapter 12 Class 7 Algebraic Expressions
  2. Concept wise

About the Author

Davneet Singh's photo - Teacher, Engineer, Marketer
Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 10 years. He provides courses for Maths and Science at Teachoo.