# Thread: Please solve

1. ## Please solve

Please fully solve it and give description with!THANKS
(2p+q-r)^3

2. Originally Posted by Peacewanters007
Please fully solve it and give description with!THANKS
(2p+q-r)^3
To solve it we need an equation and that means (2p+q-r)^3 = something....

So,
$(2p+q-r)^3 = ??$
Please give "full description"

3. Originally Posted by Peacewanters007
Please fully solve it and give description with!THANKS
(2p+q-r)^3
You need to expand this?

$(2p + q - r)^3 = ((2p + q) - r)^3$

By the binomial theorem:
$= (2p + q)^3 + 3(2p + q)^2(-r) + 3(2p + q)(-r)^2 + (-r)^3$

You take it from here.

-Dan