m²-2mn+n²-16
问题描述:
m²-2mn+n²-16
答
m²-2mn+n²-16
=﹙m-n﹚²-4²
=﹙m-n+4﹚﹙m-n-4﹚
m²-2mn+n²-16
m²-2mn+n²-16
=﹙m-n﹚²-4²
=﹙m-n+4﹚﹙m-n-4﹚