Math Forum Internet News

Volume 3, Number 36

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7 September 1998                                   Vol. 3, No. 36


Online Algebra - Brennan | Linear Algebra - Kazmierczak |
New Dr. Math FAQs ONLINE ALGEBRA - James Brennan Start the school year with a general review of all the basics. INTRODUCTION TO ALGEBRA features: - Variables and algebraic expressions and simplifying algebraic expressions - Algebraic equations solutions, the addition principle, the multiplication principle, solving linear equations in one variable, literal equations - Word problems problem solving strategies, words for operations, common types of word problems - Graphing and straight lines rectangular coordinates, graphing functions, straight lines - Systems of linear equations solutions of a system of equations, the addition method, the substitution method - Polynomials definitions, addition and subtraction of polynomials, multiplication of polynomials, products of binomials, factoring - Rational Expressions definition, simplifying rational expressions - Radicals square roots, simplifying radical expressions, rationalizing the denominator - Quadratic Equations definitions, solving by square roots, solving by factoring, completing the square, the quadratic equation This site also offers: - a Graphing Applet for exploring slope and intercepts of straight lines - a Prime Factorization Machine - a Prime Number List and, for pre-algebra, THE NUMBERS OF ARITHMETIC, a review of the real numbers and their properties, addition and subtraction, multiplication and division, exponents, order of operations, fractions, decimals, and percents. -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- LINEAR ALGEBRA MATRIX CALCULATORS - Marcus Kazmierczak - Matrix Calculator (Java Applet) A Java applet that lets you calculate the determinant, adjoint, inverse, transpose, and more of an 'n x n' matrix. - Linear Algebra Calculator (JavaScript) A matrix calculator with the ability to calculate the determinant, adjoint, and inverse of a '3 x 3' matrix. - Linear System of 3 Equations (JavaScript) A calculator that can solve a linear system of 3 equations and 3 unknowns. Kazmierczak also provides a short outline of the underlying mathematics: and his other math pages further explore Java and Java Script applications: -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- New from the Dr. Math FAQ: LEARNING MULTIPLICATION FACTS Tips for parents, teachers, and students having difficulty teaching or learning times tables. LEARNING TO FACTOR A sampling of answers from our archives on how to factor both numbers and polynomials. DIVIDING BY ZERO Why can't you divide by 0? Why is 0/0 "indeterminate" and 1/0 "undefined"? Why is dividing by zero "illegal"? Answers to these and other frequently asked math questions can be found in the Dr. Math FAQ: -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- CHECK OUT OUR WEB SITE: The Math Forum Ask Dr. Math Problems of the Week Internet Resources Join the Math Forum Send comments to the Math Forum Internet Newsletter editors _o \o_ __| \ / |__ o _ o/ \o/ __|- __/ \__/o \o | o/ o/__/ /\ /| | \ \ / \ / \ /o\ / \ / \ / | / \ / \

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