5-x/x-3/(x+3-16/x+3)化简
问题描述:
5-x/x-3/(x+3-16/x+3)化简
答
写错了
=[(5-x)/(x-3)]/[(x²-9-16)/(x-3)]
=-(x-5)/(x+5)(x-5)
=-1/(x+5)