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How to Rewrite a Number in Expanded Form With Exponents

updated 2011-08-02 23:44:46

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How to Notate Sets

updated 2011-08-02 23:40:43

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The Quadratic Formula: Satisfying Conditions

Now you have a quadratic equation with all terms to one side and a solution of zero. You must identify your coefficients (a, b, and c) for use in the quadratic formula.http://www.youtube.com/watch?v=EG9_-1strY4  

In the equation x^2 - 3x + 5 = 0, a is, in fact, the number 1. Coefficient b is -3 and c is 5.http://www.youtube.com/watch?v=EG9_-1strY4  

Once you have identified the coefficients, you may use them in the quadratic formula to find out the value(s) of x.http://www.purplemath.com/modules/quadform.htm   

updated 2011-02-21 00:45:24

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The Pythagorean Theorem Quiz

If you answered E. 5, then you're correct. If you didn't, you can try to go back now and solve for the correct answer. Otherwise, read on for a detailed explanation of how to arrive at the right answer.

First, you must remember the pythagorean theorem is a squared plus b squared is equal to c squared. Now you can plug in the numbers you've been given. That leaves you with  three squared plus four squared equals c squared. Three squared is nine, and four squared is 16. Add those together to get 25. You're not done because 25 is equal to c squared. Take the square root of both sides to find that c equals five.

updated 2011-06-22 01:41:59

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Spreadsheets

Numerous different companies have released spreadsheet programs that all perform the same basic operations listed above. Microsoft Excel is one of the earliest spreadsheet programs, compatible with a Windows operating system, it is one of the more widely known programs.http://office.microsoft.com/en-us/excel/ Open Office offers a program nearly identical to Excel called Calc. While users must purchased Microsoft Office to get Excel, the Calc program is free to download.http://www.openoffice.org/product/calc.html

Google Documents offers a spreadsheet program for users to share documents over the Internet easily with peers. Spreadsheets that are created online can also be downloaded onto a hard drive and be used in other spreadsheet programs like Excel.http://www.google.com/google-d-s/spreadsheets/

updated 2010-08-12 20:48:25

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The Quadratic Formula: An Introduction

The quadratic formula format is  x = -b±√-(b^2-4ac)

                                                             2a

To use the formula, the coefficients and constant are plugged in and calculations are made to solve for X.  The quadratic formula is actually two formulas in one.  Since the sign preceding the square root is a “±” symbol, the formula must be calculated twice, once using the plus and once using the minus.http://www.teacherschoice.com.au/maths_library/algebra/alg_6.htm 

updated 2011-02-20 23:18:16

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Math

updated 2011-06-23 22:46:31

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How to Solve Single Variable Equations

Once you have a value for x, you can check to see if you did your math correctly by putting the value of X into the original problem. The original problem was:

2x + 5 - 6  =  -17 - 2

Substituting -9 for x gives 2(-9) + 5 - 6 = -17 - 2

-18 + 5 - 6 = -17 - 2

-18 - 1 = -17 - 2

-19 = -19

The numbers are the same on each side of the equal sign, so -9 is the correct value for x.http://www.purplemath.com/modules/solvelin2.htm 

updated 2011-06-21 18:26:41

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The Quadratic Formula: How to Use the Discriminant

updated 2011-06-23 18:38:32

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