ML Aggarwal Solutions for Class 8 Maths Chapter 10 Algebraic Expressions and Identities

In Mathematics, an algebraic expression is an expression built up from integer constants, variables, and the algebraic operations (addition, subtraction, multiplication, division and exponentiation by an exponent that is a rational number).

For example, 3x2-2xy+c is an algebraic expression. Since taking the square root is the same as raising to a power.


There are 3 main types of algebraic expressions which include:

  1. Monomial Expression.
  2. Binomial Expression.
  3. Polynomial Expression.


An algebraic identity is an equality that holds for any values of its variables. For example, the identity (a + b)2 = a2 + 2ab + b2, (a – b)2 = a2 – 2ab + b2, (a + b) (a – b) = a2 – b2 and (x + a) (x + b) = x2 + (a + b) x + ab holds for all values of a and b.