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Algebra 2 A Unit 1: Expressions, Equations, and Inequalities
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Terms in this set (22)
Variable
a letter, sometimes a symbol, that represents an unknown number or numbers
equation
a mathematical statement containing an equal sign
extraneous solution
derived from the original equation, but is not a solution of the original equation
literal equation
an equation, like a formula, that has more than one variable
coefficient
the numerical factor of a term containing a variable
identity
an equation that is true for all values of the variable
numerical expression
a phrase containing numbers and operations
additive inverse
the opposite of a number so that the sum of the number and its inverse is zero
opposite
contains the opposite sign such that the sum of a number and its opposite is zero
constant
a quantity that does not change
algebraic expression
a mathematical phrase containing one or more variables
compound inequality
two inequalities joined together with the word and or or
like terms
terms that have the same variables with the same powers
constant term
a term that does not contain any variables
term
a number, variable, or product of a number and variable(s)
evaluate
to simplify after substituting numerical values for variables
reciprocal
when the numerator and denominator switch such that the product of a number and its reciprocal is 1
inverse operations
operations that undo each other
solution set of an equation
the set that contains the value(s) that make an equation true
absolute value
the distance of a real number from zero on the number line
variable quantity
a quantity in which the values may vary
multiplicative inverse
the reciprocal of a nonzero number so that the product of the number and inverse is 1
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