9x^2-12xy+4y^2+24x-16y+15

因式分解30题(要过程)am+an+bm+bn x^2+5y-xy-5x x2+xy+2xz+x (a+b)x-(b+a)y -12x(x-y)-(y-x)x^2 2x^2+4x+2 x(x+z)-y(y+z) 2(x^2-3ab)+x(4a-3b) 4x^2+12xy+9y^2-25 x^4-16 16x^4-1 x^2+9x+8 x^2-10xy+24y^2 2x^2+15xy-8y^2 3x^2-6xy+3y^2 24x^2+22x-21 -x^2+4xy- 已知X+Y=3,XY=-1,求2(X-Y)^4-9(X-Y)^2+12XY 因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y) (x+y)(x+y+2xy)+(xy+1)(xy-1)(x+y)(x-y)+4(y-1) 因式分解2x^2y-x^3-xy^2 4-12(x-y）+9（x-y）^22x^2y-x^3-xy^24-12(x-y）+9（x-y）^2 x-y/x^2+xy除以xy-x^2/x^2y^2-x^4*1/x-y （x*x-2xy）*9x*x-(9xy*y*y-12x*x*x*x*y*y)/3xy,其中x=1,y=-1 化简 帮个忙, 因式分解练习,4x^2-9x-55,2x^2-5xy-12y^2,x^2+2xy+y^2-2x-2y+1,x^2-4xy+4y^2-z^2-2z-1,x^2y^2-x^2-y^2+1,x^2-4x-xy+2y+4 XY(XY+3)+(XY+4)+4(X+Y+1)-(X+Y+2) 1-2/x+y=xy,4y+6x=xy.求xy的解? 化简:-x(2)-(2xy) *9x(2)-9xy(3)+12x(4)y(2)/(3xy)谢谢! .(x+y-2)(x+y-2xy)+(xy-1)^2 4x^2y+12xy+9y分解因式 9x^2-12xy+4y^2+24x-16y+15 .化简（x-2xy）^2乘x-（9xy^3-12x^4y^2）除3xy-（2xy）^2乖x其中x=2.y=1 化简:[4xy(x-y)^-1 + (xy^-1 - x^-1y)/(x^-1 + y^-1)] / (x+y)^2 x²-y²+5x+3y+4（x+y-2xy)(x+y-z)+(xy-1）² 9-x^2-y^2+4xy