(A) Dots, ka \(s+t=p\). Pierādīt, ka \(2s^{2} \geq p^{2}-2t^{2}\).
(B) Dots, ka \(s+t+u=p\). Pierādīt, ka \(3s^{2} \geq p^{2}-3t^{2}-3u^{2}\).