先去括号,再合并同类项3x-(4y-2x+1）x^2-(x^2-y^2)-4(2x^2-3y^2)-4a^2b+5(3a？
1个回答
展开全部
3x-(4y-2x+1）=5x-4y-11
x^2-(x^2-y^2)-4(2x^2-3y^2)=13y^2-8x^2
-4a^2b+5(3a^2b-ab^2)-4(ab^2+3a^2b)=-a^2b-9ab^2
3x^2y+xy^2-[2xy^2-4x^2y+(x^2y-2xy^2)]=6x^2y+xy^2
(x+y-z)-(x-y+z)-(x-y-z)=-x+3y-z
(5x-3y)-(2x-y)+(3y-2x)=x+y
(5a^3-2a^2-3)-(1-3a^2+2a^3)-(-2a^3+a^2-4)=5a^3-2a^2,7,应该是xxx,1,先去括号,再合并同类项
3x-(4y-2x+1）
x^2-(x^2-y^2)-4(2x^2-3y^2)
-4a^2b+5(3a^2b-ab^2)-4(ab^+3a^b)
3x^2y+xy^2-[2xy^2-4x^2y+(x^2y-2xy^2)]
(x+y-z)-(x-y+z)-(x-y-z)
(5x-3y)-(2x-y)+(3y-2x)
(5a^3-2a^2-3)-(1-3a^2+2a^3)-(-2a^3+a^2-4)
x^2-(x^2-y^2)-4(2x^2-3y^2)=13y^2-8x^2
-4a^2b+5(3a^2b-ab^2)-4(ab^2+3a^2b)=-a^2b-9ab^2
3x^2y+xy^2-[2xy^2-4x^2y+(x^2y-2xy^2)]=6x^2y+xy^2
(x+y-z)-(x-y+z)-(x-y-z)=-x+3y-z
(5x-3y)-(2x-y)+(3y-2x)=x+y
(5a^3-2a^2-3)-(1-3a^2+2a^3)-(-2a^3+a^2-4)=5a^3-2a^2,7,应该是xxx,1,先去括号,再合并同类项
3x-(4y-2x+1）
x^2-(x^2-y^2)-4(2x^2-3y^2)
-4a^2b+5(3a^2b-ab^2)-4(ab^+3a^b)
3x^2y+xy^2-[2xy^2-4x^2y+(x^2y-2xy^2)]
(x+y-z)-(x-y+z)-(x-y-z)
(5x-3y)-(2x-y)+(3y-2x)
(5a^3-2a^2-3)-(1-3a^2+2a^3)-(-2a^3+a^2-4)
已赞过
已踩过<
评论
收起
你对这个回答的评价是？
推荐律师服务：
若未解决您的问题，请您详细描述您的问题，通过百度律临进行免费专业咨询
