-(3x+y)去括号

(3+x)(3+y)去括号(3+x)(3+y)去括号(3+x)(3+y)去括号xy+3x+3y+99+3x+3y+xy(3+x)(3+y)=9+3y+3x+xy9+3x+3y+xy

3(x+y)平方怎么去括号3(x+y)平方怎么去括号3(x+y)平方怎么去括号=3(x平方+2xy+y平方）=3x平方+6xy+3y平方

3(x-y)平方怎么去括号3(x-y)平方怎么去括号3(x-y)平方怎么去括号应用和差的完全平方公式：(a-b)^2=a^2-2ab+b^2计算过程：3（x-y)^2=3(x^2-2xy+y^2)=3x^2-6xy+3y^23(x-y)&s

—[—(3x-y)]去括号.—[—(3x-y)]去括号.—[—(3x-y)]去括号.—[—(3x-y)]=3x-y方法,把最外面的负号拿到大括号里,变成3x--y第一步，去掉小括号，变成—[-3x+y]，下一步，去掉大括号，变成3x-y

—[—(3x-y)]去括号.—[—(3x-y)]去括号.—[—(3x-y)]去括号.—[—(3x-y)]=—[—3x+y]=3x-y先去中括号较简单＝3x-y

去括号x-3(y-1)去括号x-3(y-1)去括号x-3(y-1)x-3y+3注意括号前是负号,则去括号时括号内的每一项符号都要改变

3x-【(y-x)-2x-y】去括号,3x-【(y-x)-2x-y】去括号,3x-【(y-x)-2x-y】去括号,3x-【(y-x)-2x-y】=3x-【-3x】=3x+3x=6x原式＝3x－〔y－x－2x－y〕＝3x－y＋x＋2x＋y＝5

(2x-3y)-(5x-y)去括号(2x-3y)-(5x-y)去括号(2x-3y)-(5x-y)去括号(2x-3y)-(5x-y)=2x-3y-5x+y=(2-5)x+(1-3)y=-3x-2y原式=2x-3y-5x+y=-3x-2y=2x

(2x+3y)-(5x-y)去括号(2x+3y)-(5x-y)去括号(2x+3y)-(5x-y)去括号=2x+3y-5x+y=-3x+4y2x+3y-5x+y=4y-3x同意二楼一楼数学不过关要回炉重造

去括号3（x-y)-2(2x-y)=去括号3（x-y)-2(2x-y)=去括号3（x-y)-2(2x-y)=3（x-y）-2（2x-y）=3x-3y-4x+2y=-x-y

x+(-y+3)x-(-3-y)-(x-y)+33-(X+Y)怎样去括号?快x+(-y+3)x-(-3-y)-(x-y)+33-(X+Y)怎样去括号?快x+(-y+3)x-(-3-y)-(x-y)+33-(X+Y)怎样去括号?快x+(-y+

去括号：-(x-3)-3(y-3z)kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk去括号：-(x-3)-3(y-3z)kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk

-（x-3）-3（y-3z）去括号-（x-3）-3（y-3z）去括号-（x-3）-3（y-3z）去括号-（x-3）-3（y-3z）=-x+3-3y+9z=-x-3y+9z+3原式去括号后为：3-x-3y+9z

3（x-y）的二次方怎样去括号3（x-y）的二次方怎样去括号3（x-y）的二次方怎样去括号3(x-y)=3（x-2xy+y）=3x-6xy+3y

3(x-2y)平方怎么去括号3(x-2y)平方怎么去括号3(x-2y)平方怎么去括号3(x-2y)^2=3(x^2-4xy+4y^2)=3x^2-12xy+12y^2

3（x+y）-1怎么去括号3（x+y）-1怎么去括号3（x+y）-1怎么去括号3x+3y-13x＋3y－13x+3y-13x＋3y-13x+3y–13x十3y一1

去括号：-（2m-3）-(x-y)去括号：-（2m-3）-(x-y)去括号：-（2m-3）-(x-y)括号前是＋号,去括号不变是-号,括号内变号原式=-2m+3-x+y＝-2m+3-(x-y)=-2m+3-x+y前面负号后面变号希望帮忙括号

3x-2y-[-4x+(x+3y)]+y去括号然后合并同类项,3x-2y-[-4x+(x+3y)]+y去括号然后合并同类项,3x-2y-[-4x+(x+3y)]+y去括号然后合并同类项,原式=3x-2y-(-4x+x+3y)+y=3x-2y

整体去括号；化简[5(x-y)-3(x-y)-(x-y)+2(x-y)]-2(x-y)整体去括号；化简[5(x-y)-3(x-y)-(x-y)+2(x-y)]-2(x-y)整体去括号；化简[5(x-y)-3(x-y)-(x-y)+2(x-y

整体去括号；[5(x-y)-3(x-y)-(x-y)+2(x-y)]-2(x-y)化简整体去括号；[5(x-y)-3(x-y)-(x-y)+2(x-y)]-2(x-y)化简整体去括号；[5(x-y)-3(x-y)-(x-y)+2(x-y)]