For example 8xyz2 and 5xyz2 are like terms because they have the same variables and power while 3abc and 3ghi are unlike terms because they have different variables. 1 5x and 5y 2 2x 2 and 3y 2 Some more examples. In an expression only like terms can be combined.
Because it has two different variables x and y and not raised to the same power.
Unlike Terms or Dissimilar Terms. Because it has two different variables x and y and not raised to the same power. For example in 3 4x 5yzw. For example 8xyz2 and 5xyz2 are like terms because they have the same variables and power while 3abc and 3ghi are unlike terms because they have different variables.