Long Term Preservation Search Results

How To: Complete the square

Quadratic equations are easy to solve when they can be factorized. This video teaches another method of solving a quadratic equation when its not easy to find factors for it.

How To: Factor out when doing rational expressions in algebra

This video shows the method to simplify rational expressions. The example used in the video is multiple of 4 and x square plus multiple of 4 and x plus 1 or (4x^2 + 4x + 1)/(2x^3 + 11x^2 + 5x). As the first and last term is a perfect square we get the simplified numerator as (2x + 1)(2x + 1). Next, the denominator is simplified. Taking the common factor out we get x(2x^2 + 11x + 5). Now we factorize 2x^2 + 11x + 5. We get (2x + 1)(x + 5 ). Now, writing the terms in numerator and denominator w...

How To: Solve exponential and logarithmic equations

In this video tutorial the instructor shows how to solve exponential and logarithmic equations. Solving exponential equations can become very difficult if it involves large numbers. To solve these kinds of complex equations you need to get all the numbers to the same base number. The base number raised to some number should give you your original number. Now if you write the numbers as exponents of your base number you can directly equate the exponent part and solve for the missing variable. ...

How To: Factor a trinomial, GCF, then unfoil

In this video the instructor shows how to factor a polynomial. A polynomial having three terms is called as trinomial. Now if you factor it you will obtain two binomials whose product will be the original polynomial. Before factoring a polynomial you need to find out if the polynomial has a GCF. Look out for the common variables in all the three terms and pull them out which is the GCF of the polynomial. This simplifies the original equation to a polynomial which is of lower degree. Now facto...

How To: Graph quadratic equations

In this video, the instructor shows you how to graph quadratic equations. When you have a quadratic equation in terms of x and y, first try to identify the coefficients of the terms. Now use front end of the quadratic formula to find the line of symmetry which is the first half of the vertex using the formula x = -b/2a. This gives the line of symmetry. Next, plot the line using a few points starting at the line of symmetry. Take sample values of x and find the corresponding values of y on eit...

How To: Solve word problems with proportions

In this video the instructor shows how to use proportions to solve fractions. When you have a proportions problem with an unknown term, cross multiply and divide it to get the value of that unknown term. For example if given 7/8 = m/4, cross multiply 7/8 with 4, giving 7/2 which is the value of the unknown variable m. So if two quantities are proportionate then you can equate them as shown in the video and cross multiply to get the value of any unknown variable. Proportions are just fractions...

How To: Factor trinomials in a very simple way

In this video, they demonstrate how to factor a trinomial. A trinomial is a polynomial with a quadratic term in the form, ax^2+bx+c. To factor this polynomial first multiply the a and c term. You must fine two numbers that multiply to a*c and add up to b. Once you have figured out the two numbers you place the two numbers (D and E for example) in the equation (1/a)(ax+D)(ax+E). It takes a bit of practice to be good at deciding what D and E are, but the best way is to make sure that D*E = a*c ...

How To: Solve percent equations

In this tutorial the instructor shows how to solve percent equations. The general form of a percent equations is that a is b% of c. As there can be three kinds of variables a, b, c, the questions involving percent equations can be of three types having one of the three variables unknown. These kind of percent statements can be solved easily by setting up an equation. So, to convert percent statement into a equation replace the unknown term with n, the 'is' term with equals sign and the '%' si...

How To: Solve rational equations

In this video the instructor shows how to solve rational equations. If you have fractions in your equation, then you need to factorize the denominators first. Now compute the least common denominator of all the denominators of the fraction. Next multiply both sides of the equation with the least common denominator. This cancels out all the denominators of all the fractions and you are left with a linear equation. Now simply multiply the remaining terms in the numerator and add common terms to...

How To: Find the equation of a circle given: center & tangent

In this video, the instructor shows how to find the equation of a circle given its center point and a tangent line to it. To do this, take a graph and plot the given point and the tangent on that graph. Now, from the center of the circle, measure the perpendicular distance to the tangent line. This gives us the radius of the circle. Using the center point and the radius, you can find the equation of the circle using the general circle formula (x-h)*(x-h) + (y-k)*(y-k) = r*r, where (h,k) is th...

How To: Divide rational expressions

In this video the instructor shows how to divide rational expressions. To divide rational expressions follow this simple four step approach. In the fist step change the division to multiplication by flipping the second fraction. Now the original division simplifies to multiplication. In the second step factor the terms of numerators and denominators in the two fractions. In the third step cancel the common terms in the numerator and the denominator. Now finally in the fourth step multiply all...

How To: Prove some random trigonometric identities

This video shows the method to prove some trigonometric identities. This involves the use of algebra and knowledge of basic trigonometric identities. The video demonstrates three examples to illustrate this problem and its solution. The first problem shows a relatively simple problem involving sines and cosines. The video shows some basic algebra steps to simplify the problem and prove the identities. The second example involves a slightly complicated problem involving square of combination o...

How To: Add & subtract fractions

This is a video that teaches how to add and subtract fractions. For fractions that have like denominators, you simply add the numerator and keep the denominator. Next, you reduce the fraction to its lowest term.

How To: Solve an equation by the distributive property

In this simple tutorial the tutor shows how to solve equation by the distributive property. He states that when there is a number which is multiplied to a full equation, we have to multiply each and every term of that equation by that multiplying number. This is called the distributive property as the value is distributed to each and every term inside the equation. He goes on and solves a problem based on this property to give a clear idea of the property. This video shows how to solve equati...

How To: Divide similar radicals

While dividing the radicals, the numerator and the denominator must be combined into a single term, for example if we want to divide square root of 3 by square root of seven we need to combine the numerator and denominator into a single factor that is square root of 3/7, then we can divide 3/7 which is 0.4285, and square root of 0.4285 is 0.654 which is the final answer.

How To: Understand Tagalog grammar terms

This how to video describes how to understand and use Tagalog grammar terms properly. The author suggests reading the book "Conversational Tagalog" to help increase your basic understanding of the language. He then covers the use of verbs and other grammatical devices in the Tagalog language. This video is perfect for those who are studying the Tagalog language or for those who need a quick refresher. The video lasts about eight and a half minuets and leaves you with a better understanding of...

How To: Solve an equations for x

This video demonstrates how to solve algebraic equations of the first degree for the variable, "X"; in other words, the variables contained in these equations are not raised to any power other than one, which is implicit. The video starts out with an example of such an algebraic equation. Before beginning to solve the equation, the video explains the meaning of the equals sign, the definition of an equation, and what a variable is. Next the video explains what is meaning by "solving for X". T...

How To: Use the Grouping factoring method

This video is about using the grouping factoring method. We're using a four term polynomial. There is a even number of terms. We can break them into two groups of 2. The first group of "2" the common factor is "a." The last group, the common factor is "-2b". The reason we use -2b is to assure that what is in the first group is the same as the second group. Because of the distributive property of multiplication over addition, we take the a-2b and put it in one bracket. Multiply by 3x+1. With 6...

How To: Plant garden roses in containers

Planting roses can make your home beautiful, but there is more to planting roses than just picking one from your local nursery. Selecting a rose that will stay in scale with the container without much heavy pruning can make all the difference in having healthy, long-lasting, producing rose bushes.

How To: Align your vehicle's tires

This video tutorial stresses keeping on top of your car's tire alignment. If there is a problem with your tire alignment, it can cause your tires to wear out excessively and uneven. One of the few tips on detecting if your alignment is off is when taking turns. If your car feels like one tire is pulling in a different direction then others, then you might have a problem. They insist on getting your tires alignment checked before it can cause any long term damage to your tires and/or suspensio...

How To: Steam remove paint

John Leeke demonstrates using steam to remove heavy paint build up from wood surfaces in this five minute video. Steam paint removal softens the paint film so it can be more easily scraped away. It works well with the heavy paint buildup commonly found on the exterior of older buildings during house restoration and historic preservation projects.

How To: Preserve tracks properly during your expedition

Whether it's research, a school project or term paper, going on an expedition, what have you, having to preserve animal tracks should be a part of your bag of tricks that you can do. But don't just grab some random plaster of paris and just start pouring. Check out this video first and learn how to properly preserve the animal tracks that you find in the wild.

How To: Understand aperture values in photography

If you're just getting started in photography or if you're looking to learn a little bit more about your camera, then you may have run into the term "Aperture" or "Aperture Values", or those weird number numbers. Aperture is in the lens of your camera and determines how much light enters into the lens itself and helps to determine your focal length. In this video you will get a small lesson on what Aperture is, and how to calculate focal length and aperture values.

How To: Use the new Google instant search feature

Google is always moving one step closer to pretty much controlling everything in the world, in a good way ofcourse! The latest feature added is Google Instant Search, so for anything that you're searching all you have to do is start typing in the search term and Google will immediately begin giving you results on the fly. In this video you will get a quick hands on demo on how to use the new feature.

How To: Pop shove it on a skateboard

There are many tricks that a skateboarder can perform, but they each vary in terms of difficulty. In this tutorial, you'll find out how to perform the pop-shove it trick on your skateboard. This is a very common trick that most skaters are able to perform. So, good luck and enjoy!

How To: Find the formula in an arithmetical sequence

See how to find the formula for an arithmetical sequence in college-level algebra given two terms in this free video college-level algebra lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps (or just finish your homework or study for that next big test).