Constant : A symbol having a fixed numerical value is called a constant. Variable: A symbol which takes various numerical values is called a variable. The perimeter P of a rectangle of sides l and b is given by P = 2 (l + b). Here, 2 is a constant and l and b are variables. Algebraic Expressions: A combination of constants and variables with four fundamental operations of addition, subtraction, multiplication and division is called an algebraic expression. Terms: Various parts of an algebraic expression which are separated by the signs of + or – are called the ‘terms’ of the expression. Ex. 2x2 – 3xy + 5y2 is an algebraic expression consisting of three terms, namely, 2x2,–3xy and 5y2. Kinds of algebraic expression: Monomial : An algebraic expression containing only one term is called a monomial. Ex. – 5, 3y, 7xy, 3/2 x2yz, etc. are all monomials. Binomial : An algebraic expression containing two terms is called a binomial. Ex. The expression 2x – 3, 3x + 2y, xyz –5 etc. are all binomials. Trinomial: An algebraic expression containing three terms is called a trinomial. Ex. The expressions a – b + c , 2x2 + y2 – xy, etc. are trinomial. Factors of term: Each terms in an algebraic expression is a product of constant and variable . These number(s) and variables are known as the factors of those terms. A constant factor is called a numerical factor, while a variable factor is known as a literal factor. Class 8 Algebraic Expressions and Identities - 1
Class 8 Algebraic Expressions and Identities - 2 Class 8 Algebraic Expressions and Identities - 3 Class 8 Algebraic Expressions and Identities - 4 DPS Algebric Expression class 8 work sheet - 5 Download File
3 Comments
rohit
10/12/2016 05:05:19 pm
not good
Reply
yuiduh
2/1/2017 12:17:51 pm
it was nice
Reply
qwert
27/6/2017 03:25:12 pm
ok
Reply
Leave a Reply. |
Blog SeaRCH Link
All
Join Us For Update |