Question

(a+b+c)^2 + (a-b-c)^2

Simplify this:
plz give full explanation,then i will mark as branalist.​​​​

Answer 1

Answer:

a² + b² + c² - 2ab + 2bc - 2ac.

Step-by-step explanation:

The formula is:

a2+b2+c2+2ab+2bc+2ca

PROOF:-

(a+b+c)2 can be written as (a+b+c)∗(a+b+c),

Therefore, (a+b+c)2=(a+b+c)∗(a+b+c)

=a(a+b+c)+b(a+b+c)+c(a+b+c)

=a2+ab+ca+ab+b2+bc+ca+bc+c2

=a2+b2+c2+ab+ab+bc+bc+ca+ca

=a2+b2+c2+2ab+2bc+2ca

Answer 2

Here it is.............