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 15p^{2} – 4p + 5 and 9p – 11

**Solution:**

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

**Example** Subtract 5a^{2} – 4b^{2 }+ 6b – 3 from 7a^{2} – 4ab + 8b^{2} + 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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