**TI83F* AppVariable file 12/24/08, 18:26 GLA108nav 868E89BEB1644A6EA4327E33887122BEGLA108.GLA1081  difference of two squares difference of two squares:Two perfect squares separated by a subtraction sign.a^(2)-b^(2)=(a+b)(a-b) ora^(2)-b^(2)=(a-b)(a+b).  factored formfactored form:A monomial expressed as a product of prime numbers and variables with no variable having an exponent greater than 1.  factoring Ofactoring:To express a polynomial as the product of monomials and polynomials. factoring by grouping qfactoring by grouping:The use of the Distributive Property to factor some polynomials having four or more terms. greatest common factor (GCF)greatest common factor (GCF):The greatest number that is a factor of two or more numbers.Example: The greatest common factor of 30, 60, and 15 is 15. perfect square trinomialperfect square trinomial:Trinomials that are the square of a binomial.Example: x^2 + 2x + 1 is a perfect square trinomial since x^2 + 2x + 1 = (x + 1)^2. prime polynomialqprime polynomial:A polynomial that cannot be written as a product of two polynomials with integral coefficients. Square root propertyLSquare root property:For any real number n, if x^2 = n, then x = +/- n.  quadratic equation Mquadratic equation:An equation of theform ax^(2) + bx + c = 0, where a  0.  Zero Product PropertyjZero Product Property:For all numbers a and b, if ab = 0, then a = 0, b = 0, or both a and b equal zero._