Question

verify this identity (a+b+c)^2= a^2+b^2+c^2+2ab+2bc+2ca

Answer 1

It's always true.

Answer 2

just multiply (a+b+c)*(a+b+c)= and just start solving and you get there, it's very simple

Answer 3

@arbershabani97 is right!

Answer 4

\[(\overline{a + b} + c)^2 = (a + b)^2 + c^2 + 2(a + b)(c)\]

Answer 5

same thing lol :P

Answer 6

\[(a+b+c)^{2}=a(a+b+c)+b(a+b+c)+c(a+b+c)\]
Then distribute each one again and simplify :)

Answer 7

is latex coding down? or just my end?

Answer 8

Just you.

Answer 9

refresh helped ....

Answer 10

ahem staph notifications lol :P