一:(-2x^2y^3)+(8x^2)^2*(-x)^2*9-y)^3;快!

(x-2y)(x+2y)一(3x+y)(3x一y) 一:(-2x^2y^3)+(8x^2)^2*(-x)^2*9-y)^3;快! 化简(2x/(x+y)一4x/(y-x))÷8x/(x^2-y^2) [2(x一y)的3次方一8(x一y)的2次方(x+y)+6y(x一y)的2次方]÷2(x一y)的2次方 初一,算术题,[2(x一y)的3次方一8(x一y)的2次方(x+y)+6y(x一y)的2次方]÷2(x一y)的2次方 (7y一2x)一(7x一4y) (一b十+3a)一(4a一b) ((7y一2x)一(7x一4y) (一b十+3a)一(4a一b) (一8x的2次方+6x)一(5x的2次方一4x+1) x十3y二一1,3x一2y=8 (2x+y)²+(x+3y)(x-3y)-x(5x+8y)因式分解 解下列方程组或不等式组...一{ x(x-5)+y(y+6)=x平方+y平方-39 二 { x(x+7)-y(y-8）=x平方-y平方-11一{x（2x-5）大于2x平方-3x-4二{（x+1）（x-3）+8x大于（x+5）（x-5）-2 高一的因式分解,急..(X-2Y)X^3-(Y-2X)Y^3X^3-9X+8X^4+4 能做几道就说几道 2x一5y=一3 一4x十y=一3 【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y) x(x-y)2-(y-x)3 一题初一的因式分解（x-2y）x^3-（y-2x)y^3 [2/3x-2/x+y(x+y/3x-x-y)]/x-y/x 化简：{2/3x-2/(x+y)[(x+y)/3x-x-y]}/(x+y)/x 计算2/3x-2/x+y(x+y/3x-x-y)/x-y/x 化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x