(x-3y)(y+2x)-(4y-3x)(3x+4y)计算
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(x-3y)(y+2x)-(4y-3x)(3x+4y)计算(x-3y)(y+2x)-(4y-3x)(3x+4y)计算(x-3y)(y+2x)-(4y-3x)(3x+4y)计算(x-3y)(y+2x)-
(x-3y)(y+2x)-(4y-3x)(3x+4y)计算
(x-3y)(y+2x)-(4y-3x)(3x+4y)计算
(x-3y)(y+2x)-(4y-3x)(3x+4y)计算
(x-3y)(y+2x)-(4y-3x)(3x+4y)
=2x^2-3y^2-5xy+9x^2-16y^2
=11x^2-5xy-19y^2
原式=6x的平方+10xy+6y的平方-3x的平方+5xy+12y的平方=3x的平方+15xy+18的平方=（x+3y）（3x+6y）
(x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)=
(x+3y-4)(2x-y)
计算（2x-3y)(x+4y)-(3x+y)(x-2y)（2x-3y)(x+4y)-(3x+y)(x-2y)
因式分解(x-2y)(x-3y)+(x-4y)(x-5y)+（x-3y)(x-5y)+(x-2y)(x-4y)
x²/xy-x/y 3x/4x+y - x-2y/4x+y (1-y/y+x)÷x/y²-x²
x(x-y)2-(y-x)3
（y-x)+x(x-y)^3-(y-x)^4 因式分解
(2x+y)(2x-3y)+x(2y+y) 2a(x-y)-4b(x-y)
[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
计算 3x+4y/x-y+3y/y-x-4x/x-y
3x+4y/x-y +3y/y-x -4x/x-y
x(4y-x)(x-3y)+y(3y-x)(x-4y)因式分解
[(3x+y)(x-y)-(2x+3y)(x-y)]*(x-y)
计算：x+2y/x-y+2x/y-x-3y/x-y
化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方