Formula deep page
Difference of squares
(a+b)(a-b) = a^2 - b^2
This formula belongs to the chapter "Algebraic Expressions and Identities" in Class 8 Mathematics. Use it after identifying the right variables, matching the chapter context, and writing the substitution clearly.
How to use it
- Identify the quantity you need to find.
- Check the related variables and units from the question.
- Substitute values carefully into the formula.
- Simplify step by step and write the final statement.
Worked cue
(x+7)(x-7)=x²-49. 103×97=(100)²-3²=9991