Calculator:A machine used for computation.

Quadratic equation:An equation includes only second degree polynomials. Some examples are `y = 3x^2 ?C 5x^2 + 1`, `x^2 + 5xy + y^2 = 1`, and `1.6a^2 +5.9a ?C 3.14 = 0`.

Probability:A number from 0 to 1 that indicates the likelihood that something (an event) will happen. The closer a probability is to 1, the more likely it is that an event will happen. An event with a probability of 0 is impossible. An event with a probability of 1 is a certainty.

Negative integer:A number which is less than zero but not a fraction or a decimal is called a Negative Integer.

Rational expression:What is it? The quotient of two polynomials.

Slope intercept:What is it? An equation of the form y=mx+b, where m is the slope and b is the y-intercept.

Class:A synonym for set.

Variable:What is it? A characteristic that may assume more than one set of values to which a numerical measure can be assigned (e.g., income, age and weight).

Algebra:Algebra is the branch of mathematics that uses letters, symbols, and/or characters to represent numbers and express mathematical relationships. Those symbols are called variables.

Mathematics:Broadly, the systematic study of numbers, shapes and forms, relations and patterns. School mathematics includes numbers and numeration, mathematical operations, geometric concepts, algebra, statistics, and a range of problem-solving activities.

Quadratic equation:In mathematics, a quadratic equation is a polynomial equation of the second degree.

Algebra:Algebra is the study of generalized arithmetic. In algebra, unknown numbers can be represented by letters in order to solve equations. For example, 4 + x = 10 is true for x=6. Algebra (originally called al-jabr, meaning "restoration") was invented in the Middle East by Abu Ja'far Muhammad ibn Musa Al-Khwarizmi (born in Baghdad about AD 825) during the Middle Ages.

Solution:The answer to a problem.

Difference equation:A difference equation is an equation involving the differences between successive values of a function of an integer variable. A difference equation can be regarded as the discrete version of a differential equation.

Rational expression:An algebraic fraction whose numerator and denominator are polynomials.

Rational equation:A rational Equation is an Equation containing rational expressions.

Square root:One of the two equal factors of a number. If `a^2 = b`, then a is the square root of b. Example: 12 is a square root of 144 since `12^2 = 144` .

Algebra:The substitution of symbols and letters for numerical variables and constants. These symbols can be manipulated in the same way as numbers and form the basis for most mathematical calculations.

Calculator:What is it? A machine used for computation.

Equation:A mathematical statement that says two expressions have the same value; any number sentence with an = .

Polynomial:What is it? In algebra, a sum of monomials; for example, x 2 + 2xy + y 2.

Calculator:A device used to perform calculations.