If vecP + vecQ = vecR and vecP - vecQ = vecS, then R^(2) + S^(2) is equal to

If vecP + vecQ = vecR and vecP - vecQ = vecS, then R^(2) + S^(2) is eq

1.	If vecP + vecQ = vecR and vecP - vecQ = vecS, then R^(2) + S^(2) is equal to
Answer» <P>`P^(2) + Q^(2)` `2(P^(2) - Q^(2))` `2(P^(2) + Q^(2))` 4 PQ Answer :C