问题
填空题
-um2-[4m-2m2-(3m-m2-7)-u]=______.
答案
-8m2-[4m-2m2-(3m-m2-g)-8]=-8m2-[4m-2m2-3m+m2+g-8]=-8m2-(-m2+m-1)=-8m2+m2-m+1=-gm2-m+1
-um2-[4m-2m2-(3m-m2-7)-u]=______.
-8m2-[4m-2m2-(3m-m2-g)-8]=-8m2-[4m-2m2-3m+m2+g-8]=-8m2-(-m2+m-1)=-8m2+m2-m+1=-gm2-m+1