Article: Completing the square is another way to find the vertex of a quadratic equation. For this method, when you get to the end, you'll be able to find your x and y coordinates right away, instead of plugging the x coordinate back in to the original equation. Let's say you're working with the following quadratic equation: x2+4x+1=0{\displaystyle x^{2}+4x+1=0}. In this case, the coefficient of the x2{\displaystyle x^{2}} term is 1, so you can skip this step. Dividing each term by 1 would not change anything. Dividing each term by 0, however, will change everything. The constant term is the term without a coefficient. In this case, it is 1. Move 1 to the other side of the equation by subtracting 1 from both sides. Here's how you do it: x2+4x+1=0{\displaystyle x^{2}+4x+1=0} x2+4x+11=01{\displaystyle x^{2}+4x+1-1=0-1} x2+4x=1{\displaystyle x^{2}+4x=-1} To do this, simply find (b2)2{\displaystyle ({
rac {b}{2}})^{2}} and add the result to both sides of the equation. Plug in 4 for b{\displaystyle b}, since4x{\displaystyle 4x} is the b-term of this equation. (42)2=22=4{\displaystyle ({
rac {4}{2}})^{2}=2^{2}=4}. Now, add 4 to both sides of the equation to get the following: x2+4x+4=1+4{\displaystyle x^{2}+4x+4=-1+4} x2+4x+4=3{\displaystyle x^{2}+4x+4=3} Now you will see that x2+4x+4{\displaystyle x^{2}+4x+4} is a perfect square. It can be rewritten as (x+2)2=3{\displaystyle (x+2)^{2}=3} You can find your x{\displaystyle x} coordinate by simply setting (x+2)2{\displaystyle (x+2)^{2}} equal to zero. So when (x+2)2=0{\displaystyle (x+2)^{2}=0}, what would x{\displaystyle x} have to be? The variable x{\displaystyle x} would have to be -2 to balance out the +2, so your x{\displaystyle x} coordinate is -2. Your y-coordinate is simply the constant term on the other side of the equation. So, y=3{\displaystyle y=3}. You can also do a shortcut and just take the opposite sign of the number in parentheses to get the x-coordinate. So the vertex of the equation x2+4x+1=(2,3){\displaystyle x^{2}+4x+1=(-2,-3)}.
Question: What is a summary of what this article is about?
Write down the equation. Divide each term by the coefficient of the x2{\displaystyle x^{2}} term. Move the constant term to the right side of the equation. Complete the square on the left side of the equation. Factor the left side of the equation. Use this format to find the x{\displaystyle x} and y{\displaystyle y} coordinates.

Problem: Article: Stand your keyboard on its side and give a gentle tap to loosen any food or dust stuck around the keys. Too not strike the keyboard too firmly, as you don't want to damage any internal components. A gentle knock the same way you'd knock on a door should be sufficient. With your keyboard flat in a normal position, use a microfiber cloth to wipe the keyboard in short strokes from one side to the other, sweeping all debris in one direction. Pay special attention to any areas of dirt, wiping around the keys where possible. Sweep any loosened debris into the trash. Hold the canister of compressed air at the distance and orientation indicated on the manufacturer's directions, and press the trigger to release air. Blow in short spurts, directing the stream at difficult-to-reach spots. Sweep up any debris that is freed. If your keyboard has sticky, dried liquid spills, dampen a lint-free cloth with a drop of mild dish soap and a little water. Wring the cloth well. Spot clean any areas of staining, using a new area of the cloth as staining lifts.
Summary: Tap your keyboard to loosen dirt. Remove surface debris with a microfiber cloth. Try a canister of compressed air to clear stubborn debris from keys. Use a damp cloth for liquid spills.

INPUT ARTICLE: Article: Hold both ends of the scarf in either hand. Make sure there is equal of amount of scarf on either side of your neck. Bring the scarf up and toward your neck. Repeat this with the other side by holding the bottom of the other side of the scarf and placing it over your other shoulder so that both ends of the scarf are on your back. Make sure the scarf is close to your neck but not too tight. Leave about 4in (10cm) between the scarf and your neck. This piece of the scarf is now on the front side of your body. Repeat this with the other side by bringing the edge of the other side of the scarf around your neck and placing it in front. This will create multiple loops around your neck. Make sure you are not looping the scarf too tightly around your neck. You should be able to fit at least 4 fingers between your neck and the scarf loops. Tuck the ends of the scarf into the loops you have created. Once there is not enough scarf to make another loop, simply stick each end of the scarf into a space between the loops.

SUMMARY: Place the scarf around the back of your neck. Hold the edge of the scarf and place it over your shoulder. Bring the end of the scarf around your neck and place it in front. Repeat wrapping both sides of the scarf around your neck.

In Safari, add-ons are referred to as "plug-ins". Click Help Installed Plug-ins. This will open a new page that lists all of your installed plug-ins. You will be shown the file name for the plug-in (for example the QuickTime file is called "QuickTime Plugin.plugin"). You won't be able to uninstall the plug-in from within Safari, so make note of the file name. OS X has hidden the Library folder, which is where the add-on files are stored. You will need to unhide the Library folder to find the plug-in file. Open your Home folder in Finder. Click View Show View Options. Check the "Show Library Folder" box. Refer to the file that you noted in Step 2. Navigate to the folders that contain the plug-in files. The plug-in files may be located at Library/Internet Plug-Ins/ or ~/Library/Internet Plug-ins/. Click and drag the plug-in file to the Trash. Restart Safari for your changes to take effect.
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One-sentence summary --
Open your list of installed plug-ins. Find the plug-in you want to remove. Enable your Library folder. Find the plug-in file that you want to remove. Delete the file.