Question

(a+B+C) ² is what
(a-b) ²is what​

Answer 1

a^2+b^2+c^2+2ab+2bc+2ca

Answer 2

Answer:

(a+B+C)^2=a^2+B^2+C^2+2(aB+BC+Ca)

and (a-b)^2= a^2-2ab+b^2