Also known as "High School Algebra"
OK. So what are you going to learn here?
You are going to learn about Numbers, Polynomials, Inequalities, Sequences and Sums, many types of Functions, and how to solve them.
You will also gain a deeper insight into Mathematics, get to practice using your new skills with lots of examples and questions, and generally improve your mind.
With your new skills you will be able to put together mathematical models so you can find good quality solutions to many tricky real world situations.
Near the end of most pages is a "Your Turn" section ... do these! You need to balance your reading with doing. Answering questions helps you sort things out in your mind. And don't guess the answer: use pen and paper and try your best before seeing the solution.
So what is this thing called Mathematics? And how do you go about learning it?
|Welcome to Mathematics|
|The Language of Mathematics|
|Symbols in Algebra|
Next, we need to think about mathematics in terms of sets.
Now you know what a set is, let us look at different sets of numbers that you will be using:
"Equal To" is nice but not always available. Maybe you only know that something is less than, or greater than. So let us learn about inequalities.
|Introduction to Inequalities||a≥b|
|Properties of Inequalities|
You are going to be using exponents a lot, so get to know them well.
|Using Exponents in Algebra|
|Squares and Square Roots|
|Squares and Square Roots in Algebra|
|Laws of Exponents|
|Exponents of Negative Numbers|
Polynomials were some of the first things ever studied in Algebra. They are simple, yet powerful in their ability to model real world situations.
And, of course, you need to know about equations ... and how to solve them.
|Equations and Formulas|
|Zero Product Property|
|Implication and Iff|
|Theorems, Corollaries, Lemmas|
Graphs can save you! They are a great way to see what is going on and can help you solve things. But you need to be careful as they may not always give you the full story.
|Distance Between 2 Points|
|Graph of an Equation|
|Finding Intercepts From an Equation|
|Symmetry in Equations|
They are just equations for lines. But they come in many forms.
|Equation of a Straight Line|
|Point-Slope Equation of a Line|
|General Form of Equation of a Line|
|Equation of a Line from 2 Points|
|Midpoint of a Line Segment|
|Parallel and Perpendicular Lines|
A function just relates an input to an output. But from that simple foundation many useful things can be built.
Equations of Second Degree
"Second degree" just means the variable has an exponent of 2, like x2. It is the next major step after linear equations (where the exponent is 1, like x).
|Completing the Square|
|Derivation of Quadratic Formula|
|Graphing Quadratic Equations|
You already have experience in solving, but now you can learn more!
|Intermediate Value Theorem|
|Solving Radical Equations|
|Change of Variables|
We learned about inequalities above, now let's learn how to solve them.
|Graphing Linear Inequalities|
|Solving Quadratic Inequalities|
|Solving Rational Inequalities|
|Absolute Value in Algebra|
Exponents and Logarithms
You know about exponents ... well logarithms just go the other way. And together they can be very powerful.
|Working with Exponents and Logarithms|
|Exponential Growth and Decay|
Systems of Linear Equations
What happens when you have two or more linear equations that work together? They can be solved! It isn't too complicated, but can take quite a few calculations.
|Systems of Linear Equations|
|How to Multiply Matrices|
|Determinant of a Matrix|
|Inverse of a Matrix:|
|Solving Systems of Linear Equations Using Matrices|
|Systems of Linear and Quadratic Equations|
Is it likely? You be the judge!
|The Basic Counting Principle|
|Combinations and Permutations|
Sequences, Series and Partial Sums
A Sequence is a set of things (usually numbers) that are in order. You can also sum up a series, where Sigma Notation is very useful.
|Sequences - Finding A Rule|
|Arithmetic Sequences and Sums|
|Geometric Sequences and Sums|
These last few subjects use what you have learned above.
And that is all!
Other Algebra topics that may interest you now: