The Wall Street Journal, a famous magazine read by businessmen and people in finance and related fields, is said to have published an article on June 16, 1998, which said the following:
... algebra is what teachers call a gatekeeper course; you have to go through it to reach the possibilities beyond. Algebra is
the language of math and science, 'the language of problem solving,' says University of Chicago math professor Zalman Usiskin.
It deals in abstractions—using letters to generalize math operations—that expand thinking skills.
That algebra develops abstract thinking skills can be seen in many ways. Algebraic expressions and equations, for example, serve as models for interpreting and making inferences about data.
In the previous unit we learned about linear equations. In this activity, we begin learning about another set of equations, called quadratic equations. We will do so by reading some websites that provide an overview of quadratic equations. As you read each website (listed under Resources below), you will look for answers to some questions (also listed below). After answering all of the questions, answer the Big Question.
You will do this activity in groups of three. Be usre to help each other answer the questions and understand the basics of quadratic equations.
1. What is the standard form of a quadratric equation?
2. What are the ways of finding the roots of a quadratic equation?
x2 + 2x = 1?
The Standard form of a Quadratic Equation
Ways of Finding the Roots of a Quadratic Equation
Steps in Finding the Roots of a Quadratic Equation by Factoring
Steps in Finding the Roots of a Quadratic Equation by Completing the Square
Finding the Roots of a Quadratic Equation by Extracting Square Roots Quadratic Equations and Parabolas
History of Algebra and Trigonometry
Real Life Uses of Quadratic Equations
Authored by M. Amorin and P. Arinto