﹙3/2m-n﹚-2m-n/﹙2m-n﹚²等于
问题描述:
﹙3/2m-n﹚-2m-n/﹙2m-n﹚²等于
答
﹙3/2m-n﹚-2m-n/﹙2m-n﹚²
=3/(2m-n)-1/(2m-n)
=2/(2m-n)