What is unlike terms in algebra?

Answer 1

The answer depends on the context. Some examples:

• when dealing with fractions they are numbers with different denominators,
• when dealing with surds, they are terms which, in their simplified form have different expressions under the radical.
  
• when dealing with algebraic terms, they are terms in which the exponents of the variables are different.

Answer 2

In Algebra, a like term is a term where it shares either a common variable or common constant.

• 3x + 4x are like terms. Both have a common variable.
• 3x + 4y are not like terms because both do not have a common variable.
• 4 + 3 are like terms. Both have a common constant.
• 4 + 3y are not like terms. Though both have a common constant, the second term in the expression has an unlike variable attached.
  

Answer 3

That means that the terms don't have the same variables - or that they have the same variables, but raised to different powers.