Everyone knows that (a+b)^2 = a^2 + 2ab + b^
But do you know why?
Think like this – we need to find (a+b)^2 that means we need to find an area of a square with side = a+b.
Lets draw a square with side a+b.
The Square contains 2 square and 2 rectangles.
So Area of Square with Side a + b = area of 2 squares + area of 2 rectangles.
If you add all -> a^2 + ab + ab + b^2
i.e a^2 + 2ab + b^2
thats why (a+b)^2 = a^2 + 2ab + b^2.
Please put in your suggestions, Queries in the comment box.