若6m+8n-5=8m+6n,化简|m-n|-(m+n)怎么做?
问题描述:
若6m+8n-5=8m+6n,化简|m-n|-(m+n)怎么做?
答
6m+8n-5=8m+6n 化得m-n=-5/2 <0 所以原式为 -(m-n)-(m+n)=-2m
若6m+8n-5=8m+6n,化简|m-n|-(m+n)怎么做?
6m+8n-5=8m+6n 化得m-n=-5/2 <0 所以原式为 -(m-n)-(m+n)=-2m