| A | B |
|---|
| variable | a letter that represents a number. It represents the same number each time it appears in an expression |
| terms | numbers that are added to each other or subtracted from each other |
| factor | numbers that are multiplied together |
| base | in an expression requiring multiplcation, the constant or variable that tells what number is to be multiplied. In the expression 3little 2, 3 is the base |
| exponent | in an expression requiring multiplication, the constant or variable that tells how many bases to multiply together, i.e. in the expression 3little 2, 2 is the exponent |
| real numbers | all numbers on the number l ine, including positive numbers , negative numbers, zero, fractions, and decimals |
| integers | -2,-1.0.1.2. . . not including the fractions in between |
| rational numbers | a number that can be written as a ratio of two integers |
| irrational numbers | a real number that cannot be written as a ratio of two integers |
| equation | a sentence which says that one expression is equal to another expression |
| additive inverse | two numbers that add up to zero |
| multiplicative inverse | for any real number that is a number 1/x for which x(1/x) = 1 |
| commute | to interchange or reverse the positions of two numbers |
| associate | to group two of the nubmers in parentheses so that the operation between them is done first |
| axiom | basic assumption about a mathematical system, a property assumed to be true without proof |
| like terms | two terms in an expression that have the same variable raised to the same power |
| numerical coefficient | in a term, the constant that is multiplied by the variable. i.e. in 2 xy, 2 is the coefficent of xy |
| identity | an equation that is true for all values of the variable |
| polynomial | an expression that has no operation other than addition, substraction and multiplication by or of the variable |
| linear polynomial | polynomial with first degree |
| quadratic polynomial | polynomial with second degree |
| cubic polynomial | polynomial with third degree |
| monomial | a polynomial with one term |
| binomial | a polynomial with two terms |
| trinomial | a polynomial with three terms |
| conjugate binomial | binomials that are the same except for the sign between the terms; i.e. 2 x +4 + 2x-4 2 |
| quadratic formula | a formula for solving a quadratic equation the formula is x = b+ /b2-4ac over 2a |
| absolute value | the distance of a number from the origin oon the number line; the number itself or the opposite of the number, whichever is positive |
| closure | a given set of given numbers is closed under an operation if there is just one answer and the answer is in the given set whenever the operation is performed with the numbers in that set |
| empty set (null set) | the solution set has no numbers in it |
