Variable
x or any other variable
It is a variable and is expressed as a letter as for example it could be x or y
The symbol is called DELTA and looks like a triangle. -----> Δ <----
A variable
a variable
In maths the symbols x and n are usually used to represent an unknown quantity. These may be referred to as a variable.
x
eat it i know you want it
x or any other variable
An unknown number represented by a letter or symbol is a variable.
It is called a variable.
It is a variable and is expressed as a letter as for example it could be x or y
Nobody 'invented' it... letters are often used in maths to signify an unknown quantity.
It is called a variable.
algebraic expression
The symbol is called DELTA and looks like a triangle. -----> Δ <----
X is the symbol for multiplication, as in 2X2=4 X (or any other letter) is often used to represent an unknown quantity.