7 September 1998 Vol. 3, No. 36
THE MATH FORUM INTERNET NEWS
Online Algebra - Brennan | Linear Algebra - Kazmierczak |
New Dr. Math FAQs
ONLINE ALGEBRA - James Brennan
http://www.idbsu.edu/people/jbrennan/algebra/Algebra_notes.html
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.
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LINEAR ALGEBRA MATRIX CALCULATORS - Marcus Kazmierczak
http://www.mkaz.com/math/line_alg.html
- Matrix Calculator (Java Applet)
http://www.mkaz.com/math/matrix.html
A Java applet that lets you calculate the determinant,
adjoint, inverse, transpose, and more of an 'n x n'
matrix.
- Linear Algebra Calculator (JavaScript)
http://www.mkaz.com/math/js_calc.html
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)
http://www.mkaz.com/math/js_lalg3.html
A calculator that can solve a linear system of
3 equations and 3 unknowns.
Kazmierczak also provides a short outline of the underlying
mathematics:
http://www.mkaz.com/math/math35.html
and his other math pages further explore Java and Java Script
applications:
http://www.mkaz.com/math/
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New from the Dr. Math FAQ:
LEARNING MULTIPLICATION FACTS
http://mathforum.org/dr.math/faq/faq.learn.multiply.html
Tips for parents, teachers, and students having
difficulty teaching or learning times tables.
LEARNING TO FACTOR
http://mathforum.org/dr.math/faq/faq.learn.factor.html
A sampling of answers from our archives on how to
factor both numbers and polynomials.
DIVIDING BY ZERO
http://mathforum.org/dr.math/faq/faq.divideby0.html
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:
http://mathforum.org/dr.math/faq/
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