In algebra, "a x a" represents the multiplication of the variable "a" by itself. This operation is known as squaring a number. The result of "a x a" is written as "a^2" and represents the area of a square with side length "a".
In algebra, x is the unknown for which you need the value.
In algebra we consider x,y and z are variables.
x2
Algebra is using variables such as x to solve a problem. One example is x+3=8 in which x equals 5.
x+7
x is the unknown number in algebra
X + x = x x.x=x
3x^2
() x=y(x)xy(x)(x)=() (). X=
X
A variable
3x