Question

Write a note on variable. Explain?

Answer 1

variables is the quantity that may change within the context of a mathematical problem or experiment. We us these variables mainly as 'x,y,z' of 'a,b,c' these are mostly used

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Answer 2

$\huge\mathfrak{Variable}$

In algebra , we use two kinds of symbols

• Constants
• Variables

✴A symbol which has a fixed value is called a constant.

Example =>

$9, \: -2, \: \frac{7}{8}, \: \: -8$

✴A symbol which doesn't has a fixed value is called a variable.

✴It can take different values

✴They are unknown numbers

✴They are also known as literals.

✴They obey all the rules of operations of addition, subtraction, multiplication and divisions.

Example => x,y,n,m etc.

For any variables x,y ,z we have :

x+y = y+x (commutative law)

(x+y)+z = x+(y+z) (associative law)

x+0 = x = 0+x (additive identity)

x+(-x) = 0 = (-x)+x (additive inverse)