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It is really fun! What is the number next to the 12? 13 is the answer. Ok. The next 25? 26 is the correct answer. Now next to 102? 103 is the correct one. Now seriously, what Is next to a? Normally almost all of us would say that it is the b. But it is absolutely wrong! Then, what will be the correct answer? Let's look at what we have done in previous cases? We have added 1 to get the next number. Right??? So the next one has to be a+1 and b does not. This is the algebra. Instead of numbers, we use alphabets too to do the mathematical manipulation. So that a+b is a+b. There is a possibility to add as to add 2+6 8. Because a can take any value. It can be 9, -3, ./2 , 3/4 , 0.78 or any value. Same distance, b can assume any value. Now an a+? Rather than simply write it as+a we can simplify the writing as 2a. Therefore 4m+3m = 7m, and so on. Then, a multiplied by b is written as a*b or simply as ab. So abcd will be the product of a, b, c and d. If it is multiplied by an AA may be marked. You can be a drawback if we multiply a little bit of four times. Instead of typing yyyy, it will be more easy and comfortable to write as a 4 . This is how algebra grows out of a way interesting. Next, we meet with many identities, such as (a+b) 2 =a 2 + b 2 + 2ab.