(1+p)²(1+q²)-(1+q)²(1+p²)
问题描述:
(1+p)²(1+q²)-(1+q)²(1+p²)
答
(1+p)²(1+q²)-(1+q)²(1+p²)=(1+p²+2p)(1+q²)-(1+q²+2q)(1+p²)=1+q²+p²+p²q²+2p+2pq²-1-p²-q²-p²q²-2q-2p²q=2(p-q)+2...
(1+p)²(1+q²)-(1+q)²(1+p²)
(1+p)²(1+q²)-(1+q)²(1+p²)=(1+p²+2p)(1+q²)-(1+q²+2q)(1+p²)=1+q²+p²+p²q²+2p+2pq²-1-p²-q²-p²q²-2q-2p²q=2(p-q)+2...