Question

prove the identity (a+b)^2=a^2+b^2+2ab​

Answer 1

Answer:

Step-by-step explanation:

(a + b ) ^ 2 is the same as (a+b)(a +b)

so we expand the brackets,

a(a+b) + b(a+b)

a^2 + ab + ab + b^2

collect liked terms it then equals to

a^2 + b^2 + 2ab