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The product of 1 multiplied by 2 is simply 2. In mathematical terms, when you multiply a number by 1, the result is always the original number itself. Therefore, 1 times 2 equals 2.
By itself you cannot. You need to have a set of values for the variables and the expression which you need to solve.
Not really.For example: x can be considered and algebraic expression by itself, however it is only a single variable, so by definition it is not a polynomial expression (multiple-number expression).
The identity property.
It is called a power. If the power is 2, it is read as "squared and if the power is 3 it is read as "cubed", otherwise is is read as "to the power of ..."