INTRODUCTION We have already come across simple algebraic expressions like x + 3, y – 5, 4x + 5, 10y – 5 and so on. In Class VI, we have seen how these expressions are useful in formula
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TERMS OF AN EXPRESSION We shall now put in a systematic form what we have learnt above about how expressions are formed. For this purpose, we need to understand what terms of an expression and the
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LIKE AND UNLIKE TERMS When terms have the same algebraic factors, they are like terms. When terms have different algebraic factors, they are unlike terms. For example, in the expression 2xy &ndash
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MONOMIALS, BINOMIALS, TRINOMIALS AND POLYNOMIALS An expression with only one term is called a monomial; for example, 7xy, – 5m, 3z 2 , 4 etc. An expression which contains two unlike ter
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FINDING THE VALUE OF AN EXPRESSION We know that the value of an algebraic expression depends on the values of the variables forming the expression. There are a number of situations in which we nee
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