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Quadratic Equations
This lens is designed for students, parents and teachers to supplement instruction on quadratic equations. There are video examples for all the topics to go along with the text explanations. To find you topic either scroll down or use the table of contents below.
If you are a teacher looking for resoureces check out my math teaching website. There are some very good worksheets.
Though I think this lens is valuable and can really help you understand quadratic equations sometimes it isn't enough. One of the most effective ways to learn math is one on one tutoring. Tutor.com offers 25 minutes for FREE and is something you should definitely check out.
Table of Contents
Mr. T on the Web
- Simplifying Square Roots
- A lens showing how to simplify square roots. This lens will help you with the last step of the problems described in this lens.
- Solving Algebraic Inequalities
- A short lens showing how to solve algebraic inequalities.
- Solving Systems of Equations
- A lens showing how to solve systems of equations in two variables.
- Solving Linear Inequalities
- A lens showing how to graph linear inequalites and systems of linear inequalities.
- Exponent Properties
- A lens showing how to apply the basic exponent properties.
- Polynomials
- A lens showing how to add, subtract, multiply and factor polynomials.
Solving Basic Quadratic Equations
Procedure - Basic Quadratic Equations
1) Solve the equation so that the x-squared(or whatever variable in the problem) term is by itself on one side of the equation with coefficient one.
2) Take the square root of both sides. On the side with the number be sure to add +/-, because the positive and negative value will solve the equation.
3) Simplify the right side of the equation by simplifying the square root.
Special Case - When you solve for the variable squared if the other side is negative the answer is "no real solution". It is not possible to find a real square root of a negative number.
The following videos show examples of how to apply this procedure.
Solving Basic Quadratic Equations Example 1
A19.9 Solving Simple Quadratic Equations
From http://www.squidoo.com/quadraticequations the following is a video showing how to solve simple quadratic equations. For more math help check out www.teachingandlearningmath.blogspot.com
Runtime: 1:55
389 views
0 Comments:
Solving Basic Quadratic Equations Example Set 2
A19.10 Basic Quadratic Equations
From http://www.squidoo.com/quadraticequations the following are a couple of examples of solving basic quadratic equations by taking the square root of both sides. For more math help check out www.teachingandlearningmath.blogspot.com
Runtime: 1:49
295 views
0 Comments:
Solving Basic Quadratic Equations Example Set 3
A19.11 Solving Basic Quadratic Equations
From http://www.squidoo.com/quadraticequations the following is a couple of examples of how to solve simple quadratic equations. For more math help check out www.teachingandlearningmath.blogspot.com
Runtime: 1:44
264 views
1 Comments:
Tell Me About Yourself!!!
Graphing Quadratic Equations (Parabolas)
There are two specific ways to graph quadratic equations. In this section we will be looking at using a table of values to determine the graph. In order to do this we have to determine what the vertex is. The vertex is the point at the bottom(or top) of the parabola.
We start by finding the "x" coordinate of the vertex. The formula for finding this is x = -b/2a. The a and b come from y = ax2+bx+c. Once the x coordinate of the vertex is determined it is placed on the table of values in such a way that two more values can be placed above it and two below.
The next step is to fill those empty x-values by counting up and down from the x-coordinate of the vertex. Once you have done this you fill in the table of values by plugging the x-values into the original equations and finding the y-values. After you have done this you graph the points and draw in the graph.
Graphing Quadratic Equations (Parabolas) Example 1
A19.16 Graphing Quadratic Equations
From http://www.squidoo.com/quadraticequations the following shows how to graph a qaudratic equation (Parabola). For more math help check out www.teachingandlearning.blogspot.com
Runtime: 3:17
796 views
2 Comments:
Graphing Quadratic Equations (Parabola's) Example 2
A19.17 Graphing Quadratic Equations
From http://www.squidoo.com/quadraticequations this is an example how to graph a quadratic equation(parabola). For more math help checkout www.teachingandlearningmath.blogspot.com
Runtime: 3:01
1032 views
4 Comments:
What Every High School Student Needs!!!
A graphing calculator is an essential learning tool for learning Algebra, Precalculus and Calculus.
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Quadratic Equation Poll
Solving Quadratic Equations Using the Quadratic Formula
It is key to first figure out a,b and c. To do this you solve the quadratic equation for zero. The number in front of the x2 is a, the number in front of x is the b and the number that is by itself is c.
The following video examples show how to find the solutions to a quadratic equation using the quadratic formula.
Don't Forget!!!!
Use ax2+bx+c=0 to find out a, b, and c. a is in front of the x squared term b is in front of the x and c is the part without a variable.
Solving Quadratics Equations Using the Quadratic Formula Example 1
A19.12 Using the Quadratic Formula
From http://www.squidoo.com/quadraticequations the following is an example of how to solve a quadratic equation using the quadratic formula. For more math help check out www.teachingandlearningmath.blogspot.com
Runtime: 2:47
241 views
1 Comments:
Solving Quadratic Equations Using the Quadratic Formula Example 2
A19.13 Quadratic Formula
From http://www.squidoo.com/quadraticequations the following shows how to solve quadratic equations using the quadratic formula. For more math help check out www.teachingandlearningmath.blogspot.com
Runtime: 2:43
250 views
2 Comments:
Solving Quadratic Equations Using the Quadratic Formula Example 3
A19.14 Quadratic Formula
From http://www.squidoo.com/quadraticequations the following is an example of how to use the quadratic formula to solve quadratic equations. For more math help check out www.teachingandlearningmath.blogspot.com
Runtime: 1:58
124 views
0 Comments:
Solving Quadratic Equations Using the Quadratic Formula Example 4
A19.15 Using the Quadratic Formula
From http://www.squidoo.com/quadraticequations the following video is an example of how to simplify quadratic equations. For more math help check out www.teachingandlearningmath.blogspot.com
Runtime: 2:04
236 views
0 Comments:
The Derivation of the Quadratic Formula
Derivation of the Quadratic Formula
From http://www.squidoo.com/quadraticequations the following shows how to derive the quadratic formula by completing the square. For more math help check out www.teachingandlearningmath.blogspot.com
Runtime: 3:57
852 views
1 Comments:
Solving Quadratic Equations by Factoring
Multiplication Property of Zero
If a*b = 0 then either a = 0 or b = 0.
Thus we set the quadratic equation equal to zero and factor. Once we have factored the quadratic equation then we set each factor equal to zero. We do this because when one of the two factors is equal to zero then the quadratic equation is equal to zero.
Watch the following videos to see some examples of how to solve quadratic equations by factoring.
Solving Quadratic Equations by Factoring Example Set 1
A110.1 Solving Quadratic Equations by Factoring
From http://www.squidoo.com/quadraticequations the following is an example of how to solve quadratic equations by factoring. For more math help check out www.teachingandlearningmath.blogspot.com
Runtime: 1:58
294 views
0 Comments:
Solving Quadratic Equations by Factoring Example Set 2
A110.2 Solving Quadratic Equations by Factoring
From http://www.squidoo.com/quadraticequations the following is an example of how to solving quadratic equations by factoring. For more math help check out www.teachingandlearningmath.blogspot.com
Runtime: 3:09
815 views
0 Comments:
Quadratic Equation Worksheets
- Using the Quadratic Formula
- Eight problems using the quadratic formula to solve quadratic equations.
- Basic Quadratic Equations
- Nine problems on solving basic quadratic equations. No "x" term.
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courtsantos
Nice work I could've used your work to improve my math grades in highschool...lol Posted April 05, 2008 |
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adez7
What a great lens! ***** Posted April 04, 2008 |
Thanks! I am developing an online high school physics course for a school, and this is perfect for the math tie-in!
Posted February 23, 2008
