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Quadratic Equations Posted on 2011-05-04 18:30:50

The name Quadratic comes from "quad" meaning square, because the variable gets squared (like x2).
Quadratic Equation looks like: ax2 + bx ...Fibonacci Sequence Posted on 2011-05-03 12:39:04

This is the Fibonacci Sequence:
0, 1, 1, 2, 3, 5, 8, 13, 21, 34, ...
The next number is found by adding the two numbers before it together:...Calculate terms of Sequences Posted on 2011-05-03 12:37:15

A Sequence is a set of things (usually numbers) that are in order.
Examples:
Calculate the first 4 terms of this sequence: {an} = { (-1/n...Infinite or Finite sequences Posted on 2011-05-03 12:34:44

A Sequence is a set of things (usually numbers) that are in order. If the sequence goes on forever it is called an infinite sequence, otherw...Natural Logarithms Posted on 2011-05-03 12:32:53

A logarithm answers a simple question: How many of one number do we multiply to get another number?
A natural logarithm is when base is e (...Logarithms Posted on 2011-05-03 12:29:58

A logarithm answers a simple question: How many of one number do we multiply to get another number?
For example:
How many 2s need to be m...Multiply two polynomials Posted on 2011-05-03 12:24:54

To multiply two polynomials:
* multiply each term in one polynomial by each term in the other polynomial
* add those answers togeth...Cube roots Posted on 2011-05-03 12:21:23

To cube a number, just use it in a multiplication 3 times. A cube root goes the other direction:
3 cubed is 27, so the cube root of 27 is 3
...Perfect Cubes Posted on 2011-05-03 12:19:32

The Perfect Cubes are the cubes of the whole numbers:
1 = 1
2 = 8
3 = 27
4 = 64
5 = 125
6 = 216
7 = 343
8 = 512
9 = 729
10 = 1000
11 = 1331...Reciprocal of a number Posted on 2011-05-03 12:16:42

Turn it upside down. To get the reciprocal of a number, just divide 1 by the number.
Examples:
Number -> Reciprocal = As a Decimal
2 -...Reciprocal of a Variable Posted on 2011-05-03 12:15:10

Turn it upside down. If you are given a variable "x", its reciprocal is "1/x".
Likewise, if you are given something more complicated like "...Substitution in Algebra Posted on 2011-05-03 12:07:53

In Algebra "Substitution" means putting numbers where the letters are:
If you have: x-2 and you know that x=6 ... then you can "substitute"...Perpendicular lines Posted on 2011-05-03 12:04:31

A line is perpendicular to another if they meet at 90 degrees.
The red line is perpendicular to the blue line:
Perpendicular have slope...Parallel lines Posted on 2011-05-03 12:01:02

Lines are parallel if they are always the same distance apart (called "equidistant"), and will never meet.
An example of two parallel lin...Much and many Posted on 2011-05-01 14:04:49

Much is used with non count nouns (always in the singular). Many is used with count nouns in the plural.
Much and many are not often used, ...