Elementary Algebra

# Key Terms

Elementary AlgebraKey Terms
complex rational expression
A complex rational expression is a rational expression in which the numerator or denominator contains a rational expression.
extraneous solution to a rational equation
An extraneous solution to a rational equation is an algebraic solution that would cause any of the expressions in the original equation to be undefined.
proportion
A proportion is an equation of the form $ab=cdab=cd$, where $b≠0,d≠0.b≠0,d≠0.$ The proportion is read “$aa$ is to $bb$, as $cc$ is to $d.d.$
rational equation
A rational equation is two rational expressions connected by an equal sign.
rational expression
A rational expression is an expression of the form $pqpq$, where p and q are polynomials and $q≠0.q≠0.$
similar figures
Two figures are similar if the measures of their corresponding angles are equal and their corresponding sides are in the same ratio.