来自汤清的问题
10道整式的加减,急
10道整式的加减,急
1回答
2020-05-10 06:44
10道整式的加减,急
10道整式的加减,急
12x-(x+3y)-(-x-y)-(x-y)=
2-2(3x+z)-(-6x)+(-5y+3z)=
39a2+[7a2-2a-(-a2+3a)]=
4-(7x-y-2z)-{[4x-(x-y-z)-3x+z]-x}=
52x2-{-3x-[4x2-(3x2-x)+(x-x2)]}=
65m2n+(-2m2n)+2mn2-(+m2n)=
7(4xy2-2x2y)-()=x3-2x2y+4xy2+y3=
82x+2y-[3x-2(x-y)]=
92y+(-2y+5)-(3y+2)=
102a-(3a-2b+2)+(3a-4b-1)=
这几道题目应该蛮省力的,你自己算算吧