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Class – 7 Maths, Topic – Algebraic Expressions, ALGEBRAIC EXPRESSION:, A combination of constants and variables connected by some or all of the, fundamental Operations, is called an Algebraic Expression., Ex. 2x2y – 5x + 6, , Factors of a Term: The numbers or variables that are multiplied to form a, term are called its factors., For example, 5xy is a term with factors 5, x and y.,  The factors cannot be further factorized. ...,  The factors of the term 3a4 are 3, a, a, a and a.,  1 is not taken as a separate factor., Coefficient: A number which is placed before another quantity and which, multiplies it,, Ex. 3 in the quantity 3x, , Fundamental Arithmetic Operations:, , Like and Unlike terms:, The terms having the same variable factors are called like terms., Ex. 3x, -7x, ½ x etc, Constant: A symbol having a fixed numerical value is called a constant., 2, , Ex. All types of Numbers like 0, 1, -1, 0.4, 3, 5 etc., , Variable: A symbol which can take various numerical values is called a, variable., Ex. All literals or Alphabets like x, y, z etc., Term: The different parts of an algebraic expression separated by the sign +, or – are called the terms of an expression., , The terms having the same variable factors are called unlike terms., Ex. 3y, 3z, 3x etc.

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TYPES OF ALGEBRAIC EXPRESSION:, , FINDING THE VALUE OF AN ALGEBRAIC EXPRESSION:, , Degree of Polynomial:, The highest power of the variable in a polynomial is called its degree.,  If a polynomial consists of more than one variable, then the sum of the, powers of variables in its different terms determine its degree., , ADDITION OF ALGEBRAIC EXPRESSION

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SUBTRACTION OF ALGEBRAIC EXPRESSION