where (a+b)^2 is used in our daily life ???
Answers
Answer:
Before going to the formula let's start from the basics.For example 5^2 is 5 square.Which means all the four sides of the square is equal to 5(always imagine in this way for better understanding this formula in real time applications).
Please refer the above figure.
To apply this formula, consider you have a farm in your village .In older days people use to say the size of farm in squares(still in use) eg. 5 square land ,10square land.
Dividing a farm into squares will be useful in doing calculations simple.
Consider you have a 5 square farm.That is, all the side of the farm equals to 5.
Now to calculate how much fertilizer you need for your entire farm,you just divide your entire farm into 5 rows and 5 columns(now your farm totally has 25 small squares which is nothing but 5^2).
one square need 1 pack of fertilizer then absolutely you need 25pack of fertilizers for your entire farm.
If you have a 10square farm then you need 10^2=100pack of fertilizers.
Now we go for (a+b)^2.Consider a line like the one below.
The pink side is a and the blue is b. So the total length of the line will be ( a+b)
To understand (a+b)^2 please refer the above
picture.
So the total area of the quare will be the addition of all these areas a^2+b^2+ab+ab
Which is a^2+2ab+b^2.
Think now you are cleared.
