分解因式 2P²+4PQ+2Q²-8T²
问题描述:
分解因式 2P²+4PQ+2Q²-8T²
答
2P²+4PQ+2Q²-8T²
=2[(P²+2PQ+Q²)-4T²]
=2[(P+Q)²-4T²]
=2(P+Q+2T)(P+Q-2T)