Points to Remember - Algebraic Expressions and Identities

Algebraic expressions are mathematical expressions that consist of variables, constants, and mathematical operations. On the other hand, algebraic identities are mathematical equations that are true for all values of the variables involved. Here are some important points to remember when dealing with algebraic expressions and identities:

Algebraic Expressions

- Algebraic expressions can be simplified by combining like terms. Like terms are terms that have the same variables raised to the same powers.
- To evaluate an algebraic expression, substitute the given values for the variables and simplify using the order of operations (PEMDAS).
- When solving equations, perform the same operation on both sides to keep the equation balanced.
- Factoring is the process of expressing an algebraic expression as a product of its factors. This can help in solving equations and simplifying expressions.

Algebraic Identities

- Algebraic identities are equations that are true for all values of the variables involved.
- Some common algebraic identities include the distributive property, the commutative property, and the associative property.
- The distributive property states that a(b + c) = ab + ac. This property can be used to simplify expressions by distributing a factor to each term inside parentheses.
- The commutative property states that the order of addition or multiplication does not affect the result. For example, a + b = b + a and ab = ba.
- The associative property states that the grouping of terms does not affect the result of addition or multiplication. For example, (a + b) + c = a + (b + c) and (ab)c = a(bc).

Evaluating *=2

Now, let's apply these points to the given expression, *=2.

- Since there are no variables or constants given, we can assume that * represents an unknown number.
- To evaluate the expression, we need to perform the operation of multiplication. However, we do not know what number * represents.
- Therefore, we cannot simplify or evaluate the expression without more information about *.

In conclusion, evaluating *=2 depends on the value of *. Without knowing what * represents, we cannot simplify or evaluate the expression. However, we can use the points mentioned above to simplify and evaluate other algebraic expressions.