Question

Why does a²+b²+ab = (a+b)²-ab​

Answer 1

Step-by-step explanation:

We can write (a+b )^2 as (a+b)(a+b)

so on multiplying :

(axa)+(axb)+(bxa)+ (bxb)

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

= a^2+ 2ab + b^2