Question

hi Guy's it is a maths question is -
(a+b)² = a² + 2ab + b²
my reall question is where that 2ab came plzzzzzzzZZZZZZ TELLL ME

Answer 1

we can write it as(a+b)(a+b)
a(a+b)+b(a+b)
a2+ab+ba+b2
a2+2ab+b2
HOPE IT HELPS YOU IF IT DOES PLZ MARK AS BRAINLIEST

Answer 2

Actually if you break-down the main equation that is
(a+b)²,it is actually the product of (a+b) multiplied by(a+b)
So we can write it as.....
(a+b)²=(a+b)×(a+b)
=firstly multiply (a+b) by (a) then by (b)
=a(a+b)+b(a+b)
now it becomes.....
=a²+ab+ab+b²
now we can add (ab+ab) as they are like terms.
It becomes 2ab
=a²+2ab+b²
That is where 2ab came from.
Hope you understood.