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Algebra Homework Help : Formulae & Algebraic Relations

Preparation Just what you need to know !

How does a Formula express an Algebraic Relation ?

A formula is a fixed rule that shows the relation between two or more variables. In other words, it is an equation that expresses in symbols a general algebraic relationship (i.e., the dependence of some variables on other variables).


Example :
Express the following statement as a formula:
Perimeter (P) of a rectangle equals twice the sum of the length (L) and the breadth (B).


Perimeter of rectangle = 2 (length + breadth)
Thus, P = 2(L + B)
where P is the variable that denotes the perimeter of the rectangle,
L is the variable that denotes the length of the rectangle, and
B is the variable that denotes the breadth of the rectangle.


Formulae can be written in different but equivalent ways.
P = 2(L+B) can be also written as P = 2(B + L) or P = 2L + 2B or P = 2B + 2L.

Since there are multiple ways of writing an equation (formula), it is possible that the computer may mark a correct answer wrong when you solve some of the algebra exercises. So, please always check the answers and explanations by clicking on the 'Score and Show Answer(s)' button.

 Practice Exercise for Algebra Module on Formulae & Algebraic Relations


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