equation
factor
When two expressions are equal to each other they form an equation.
algebraic expressions
No, expressions cannot have the same value in algebra. They may be assigned to different values and on solving we can get different answers in each case.
Please don't write "of the expressions below" if you don't provide the list. We can't guess what list you are seeing.
An equivalent expression.
equation
an equation.
Yes, numerical expressions can have the same value. For example, the expressions 2+3 and 5 both have the value of 5. Similarly, the expressions 2x3 and 6 both have the value of 6. In general, any two numerical expressions that evaluate to the same number will have the same value.
1(: if the variable is not given to you
When two expressions are equal to each other they form an equation.
There are many expressions that have this value. The simplest one is the number zero itself.
they are expressions
algebraic expressions
No single number can be negative or positive. There are equations or expressions whose value can be either but not a number.
Equivalent expressions.
None of "these" expressions represent anything!
It means that two expressions represent the same number; for example, 5 is equivalent to 3 + 2. If there are variables in the expression, it means that the two expressions will evaluate to the same number, for any value assigned to the variable or variables. For example, for any value of x, 2x is the same as x + x; therefore, the two are equivalent.