化简：2x^2y+{2xy-[3x^2y-2(-3x^2y+2xy)]-4xy^2}

来源：学生作业帮编辑：搜搜考试网作业帮分类：数学作业时间：2024/07/28 16:29:10

$化简：2x^2y+{2xy-[3x^2y-2(-3x^2y+2xy)]-4xy^2}$

2x²y+{2xy-[3x²y-2(-3x²y+2xy)]-4xy²}
=2x²y+2xy-6x²y-4xy-4xy²
=-(4x²y+2xy+4xy²)
=-2xy(2x+1+2y)
再问：答案是对的吗？解释，谢谢！
再答：不对我再改等等哈 2x²y+{2xy-[3x²y-2(-3x²y+2xy)]-4xy²} =2x²y+2xy-9x²y+4xy-4xy² =6xy-7x²y-4xy² =xy(6-7x-4y)
再问：还是跟我的不一样，我没有过程，所以我想问一下怎么做的
再答：现在呢我刚刚又改了
再问：我的答案是-7x^2y+6xy-4xy^2
再答：那就一样了呵呵终于啊不容易啊

（xy-x^2)乘以(xy)/(x-y) (x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y) （-3x^y+2xy)-( )=4x^+xy x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2 已知x-y=4xy，则2x+3xy-2yx-2xy-y x^2-xy-6y^2+3xy+y+2 化简：x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y) （x^2+xy/x-y)/（xy/x-y)计算计算3xy[2xy-x(y-2)+x-1] 计算：3xy[2xy-x（y-2）+x] 化简!1、（x^2-xy）+xy+y^2 2、3（x^2-xy）-xy+y^2 5xy^2-[3xy^2-(4xy^2-2x^y)]+x^2y-xy^2如何化简