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化简(3x^2-5xy)+{-x^2-[-3xy+2(x^2-xy)+y^2]}

来源：学生作业帮 编辑：神马作文网作业帮 分类：数学作业 时间：2024/11/17 02:02:51
化简(3x^2-5xy)+{-x^2-[-3xy+2(x^2-xy)+y^2]}
化简(3x^2-5xy)+{-x^2-[-3xy+2(x^2-xy)+y^2]}
(3x^2-5xy)+{-x^2-[-3xy+2(x^2-xy)+y^2]}
=3x^2-5xy-x^2-[-3xy+2(x^2-xy)+y^2]
=2x^2-5xy+3xy-2(x^2-xy)-y^2
=2x^2-2xy-2x^2+2xy-y^2
=-y^2
（xy-x^2)乘以(xy)/(x-y) (x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y) x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2 计算3xy[2xy-x(y-2)+x-1] 计算：3xy[2xy-x（y-2）+x] （-3x^y+2xy)-( )=4x^+xy 5x^2y/-1/2xy*3xy^2 -3(xy-2x²)-[y²-(5xy-4x²)+2xy] 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 已知x^2-xy=5,xy-y^2=-3求3(x^2-xy)-xy+y^2 2x平方y-2xy+3xy平方+5+2xy+x平方y-3xy平方-3 过程!