Addition and Subtraction of Algebraic Expressions

Steps to add or Subtract Algebraic Expression

  • First of all, we have to write the algebraic expressions in different rows in such a way that the like terms come in the same column.
  • Add them as we add other numbers.
  • If any term of the same variable is not there in another expression then write is as it is in the solution.

Example

Add 15p2 – 4p + 5 and 9p – 11

Solution:

Write down the expressions in separate rows with like terms in the same column and add. 

Example Subtract 5a2 – 4b+ 6b – 3 from 7a2 – 4ab + 8b2 + 5a – 3b.

Solution:

For subtraction also write the expressions in different rows. But to subtract we have to change their signs from negative to positive and vice versa.

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