2x^2y+[2xy-[3x^2y-2[2xy-3xy^2]]-4xy^2]化简在求值x=1,y=-1

来源：学生作业学帮网编辑：学帮网时间：2024/06/28 16:03:05

2x^2y+[2xy-[3x^2y-2[2xy-3xy^2]]-4xy^2]
=2x^2y+[2xy-[3x^2y-4xy+6xy^2]-4xy^2]
=2x^2y+[2xy-3x^2y+4xy-6xy^2-4xy^2]
=2x^2y+[6xy-3x^2y-10xy^2]
=2x^2y+6xy-3x^2y-10xy^2
=6xy-x^2y-10xy^2
=xy(6-x-10y)
=-1*(6-1+10)
=-1*15
=-15

因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y) X^Y-2XY^2+y^3 (-x-y)(x^2+xy+y^2) 化简x^-y^/x^-2xy+y^ 2*(x-y)²(y-x)(xy) （x^2+xy/x-y)/（xy/x-y)计算化简：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(x^2y^2-xy)-y(x^2-x^3y)]/(2x^2y) [x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y [x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y 因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6 -xy^2(x+y)^3+x(x+y)^2因式分解 (x+3y)/(x^2+xy)-x+y计算题 x*x+xy=3,xy+y*y=2,则x*x+2xy+y*y=________? (x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)答案应为-2x-x*x-3x， X-Y/2X+2Y XY/X+Y² 因式分解：x×x-xy-2y×y-x-y