(3x^2y-2xy^2)-(xy^2-2x^2y)-3(x^2y^2+x^2y)+3(x^2y^2=xy^2) 其中x

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：2024/06/12 17:42:13

(3x^2y-2xy^2)-(xy^2-2x^2y)-3(x^2y^2+x^2y)+3(x^2y^2=xy^2) 其中x=-1 y=2
(3x^2y-2xy^2)-(xy^2-2x^2y)-3(x^2y^2+x^2y)+3(x^2y^2+xy^2) 其中x=-1 y=2

(3x^2y-2xy^2)-(xy^2-2x^2y)-3(x^2y^2+x^2y)+3(x^2y^2+xy^2)
=3x^2y-2xy^2-xy^2+2x^2y-3x^2y^2-3x^2y+3x^2y^2+3xy^2
=2x^2y
=2(-1)^2×2
=4

(x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y) （xy-x^2)乘以(xy)/(x-y) （x+2y-3xy)-(-2x-y+xy),其中x+y=1/2,xy=-1/2 （x＋2y-3xy）-（-2x-y+xy）,其中x+y=,xy=-,求值. (x+y)(x-y)-(2xy+3y)平方（x^2+xy/x-y)/（xy/x-y)计算 [x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y 化简：x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y) 1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y) （x+2y-3y)- (-2x-y+xy ) 其中x+y=0.5 xy等于-0.5 （-3x^y+2xy)-( )=4x^+xy x^2-xy-6y^2+3xy+y+2