Question

Im so tired what is square of (a+b+c) and
what is the shortcut of this

Answer 1

\[(\color{blue}{a+b} + \color{#cc0000}c)^2 \]\[= \color{blue}{(a +b)^2} + 2\color{blue}{(a+b)}\color{#cc0000}{(c)} + \color{#cc0000}{c^2}\]

Answer 2

That's not too hard to simplify, eh?

Answer 3

ah

Answer 4

In the end, you should get\[a^2 + b^2 + c^2 + 2ab + 2bc + 2ca\]

Answer 5

thanks