√(2m-3n-3)≥0,│m-2n-2│≥0∵√(2m-3n-3)+│m-2n-2│=0∴2m-3n-3=0...①m-2n-2=0.②①-2②得：n+1=0∴n=-1,m=2n+2=0∴7m-8n=8∴7m-8n的立方根=2明教为您解答,请点击[采纳为满意回答];如若您有不满意之处,请指出,...