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Basic algebra formulas that you can revise anytime and anywhere

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FORMULAS FOR BEGINNER (a+b) ^2= a^2+b^2+2ab (a+b) ^2= (a-b) ^2+4ab (a-b) ^2= a^2+b^2-2ab (a-b) ^2= (a+b) ^2-4ab a^2+b^2= (a+b) ^2-2ab a^2+b^2= (a-b) ^2+ 2ab a^2-b^2= (a+b) (a-b) (a+b+c) ^2= a^2+b^2+c^2+2(ab+bc+ac) (a-b-c) ^2= a^2+b^2+c^2-2(ab-bc+ac) (a+b) ^3= a^3+b^3+3ab(a+b) (a-b) ^3= a^3-b^3+3ab(a-b) a^3+b^3= (a+b) (a^2-ab+b^2) a^3-b^3= (a-b) (a^2+ab+b^2) a^4-b^4= (a^2-b^2) (a^2+b^2) = (a^2+b^2) (a+b) (a-b) a^5+b^5= (a+b) (a^4-a^3b+a^2b^2-ab^3+b^4) a^5-b^5= (a-b) (a^4+a^3b+a^2b^2+ab^3+b^4)
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What You Know About Transmission Media And What You Don't Know About Transmission Media

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Transmission Media is defined as through which information is carried from source to destination. These transmission media can be connection oriented or connection less. There are two types of transmission media: Guided media(Connection oriented) Unguided media(Connection less) Guided Media: Guided media are those that provide a conductor from one device to the other. Signal requires a physical path for transmission. It is called wired communication. It provides direction to signal for travelling. Example : Twisted pair cable, Coaxial cable, Optical fibre Cable, Hub. Unguided Media: Unguided media are those transport electromagnetic waves without the use of physical conductor. They are wireless. Signal is broadcasted through air or sometimes water. It does not provide any direction. Example : Radio wave, Micro wave. F eatures of Connection oriented communication : Connection is necessary. It is used for connection establishment. It can be used u...
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Five New Thoughts About Basics Of Communication System That Will Turn Your World Upside Down

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Definition of network : A network is a set of devices/nodes connected by media links. Media means communication channels. These devices may be computer, mobile, printer etc. Let's try to understand through the following figure given below : A im of data communication : The aim is to exchange data such as text, audio/video from one point to another point. Basic communication Model: Computer network criteria: 1. Performance : Response Time is the time between the end of a research and the beginning of a response. Request a file transfer and start the file transfer. Factors that affect Response Time are: Number of Users: More users on a network slow the connection. Transmission Speed: Transmission speed is that data will be transmitted. It is measured in bits per second (bps). Media Type: Media is the connection between two nodes. It can be different types. Hardware Type: Slow computers such as XT or fast such as Pentiums. Software Program: How good ...
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