5m²-2mn-n²因式分解,
问题描述:
5m²-2mn-n²因式分解,
答
5m²-2mn-n²
=6m²-m²-2mn-n²
=6m²-(m²+2mn+n²)
=6m²-(m+n)²
=(√6m+m+n)(√6m-m-n)