Class VIII Mathematics
Chapter 8: Algebraic Expressions and Identities
Standard NCERT & CBSE aligned study curriculum. Master concepts, track accuracy, revise weak areas, and challenge yourself with 9 customized practice modes.
Syllabus Sections
Key Formulas & Equations
Click Copy to duplicateDifference of Squares
(a-b)(a+b) = a^2 - b^2
Product of sum and difference is difference of squares.
Sum Square Identity
(a+b)^2 = a^2 + 2ab + b^2
Expansion of squared sum.
Related Formulas from Adjacent Chapters
Compound Interest Amount
A = P\left(1 + \frac{R}{100}\right)^n
[From Comparing Quantities] Future accumulated value under annual compounding interest.
Area of Trapezium
A = \frac{1}{2}(a+b)h
[From Mensuration] Half the sum of parallel sides times perpendicular height h.
Volume of Cylinder
V = \pi r^2 h
[From Mensuration] Base circle area times height.