1.2+Evaluate+and+Simplify+Algebraic+Expressions

1.2 Evaluate and Simplify Algebraic Expressions


 * Numerical expression - consists of numbers, operations, and grouping symbols.
 * Power - an expression formed by repeated multiplication of the same factor.

A power has two parts: an exponent and a base. The exponent represents the number of times the base is used as a factor. (:



You do not usually write the exponent when it is 1.

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 * variable - is a letter that is used to represent one or more numbers.
 * algebraic expression - an expression using variables.
 * like terms - terms that have the same variable parts.
 * equivalent expressions - two algebraic expressions have the same value for all values of their variables.
 * identity - a statement such as 8x+3x=11x that equates to equivalent expressions.

Terms and Coefficients!(:

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 * terms - an expression that can be written as a song (parts added together).
 * variable term - a term that has a variable part.
 * constant term - a term with no variable part.
 * coefficient - when a term is a product of a number and a power of a variable.