［x（x^2y^2-xy）-y（x^2-x^3y）］÷3x^2-y

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：2024/11/13 09:09:08

原式
=(x^3y^2-x^2y-x^2y+x^3y^2)÷3x^2-y
=1/3(2x^3y^2-2x^2y)÷x^2-y
=1/3(2xy^2-2y)-y
=2xy^2/3-2y/3-y
=2xy^2/3-5y/3

化简：x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y) [x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y x根号x+x根号y/xy-y^2)-（x+根号xy+y/x根号x-y根号）y ［x（x^2y^2-xy）-y（x^2-x^3y）］÷3x^2-y 急![(3x+y)²-3(3x-y)(x+y)-(x-3y)(x+3y)]÷(2xy) (x+y)(x-y)-(2xy+3y)平方 x-y/x²÷x²-2xy+y²/xy*（xy-x²） 1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y) 已知xy=-2,x-y=3,求（x+y)（x-y)-y^2+（x-y)^2-（6x^2y-2xy^2)÷2y x+y 3次方公式是不是 = （x+y)(x^2-xy+y^2）? 计算4xy+（x-2y）的平方+(x+3y)(3y-x) (2x-y)(2x+y)+(2x-y)(y-4x)+2y(y-3x)+2x^4y^2÷(xy)^2