Question

why (a+b)²=a²+b²+2ab?​

Answer 1

Answer:

that is the formula..

Step-by-step explanation:

a+b

×a+b

_____

a2+ab

+ba+b2

______

a2+2ab+b2

Answer 2

Answer:

(a+b)^2= (a+b)×(a+b)

=a×(a+b)+b(a+b)

=a^2+ab+ba+b^2

• =a^2+2ab+b^2