(3x-4y)^2-(3x+4y)^2-(4x+3)(4x-3)
x/x-y*y^2/x+y-x^3y2/x^4-y^4/x^2/x^2+y^2
(x+3y-4)(2x-y)
(2x+y)(2x-3y)+x(2y+y) 2a(x-y)-4b(x-y)
4x*3-4x*2y-(x-y)因式分解
4x^3-4x^2y-(x-y)因式分解
(2x-y)(2x+y)-2(3x-4y)(4y+3x)
(x-3y)(y+2x)-(4y-3x)(3x+4y)计算
(x+2)(x+3) (x-4)(x+1) (y+4)(y-2) (y-5)(y-3)
把(x+3y)(3x-4y)-(x-2y)(x+3y)分解因式!
计算(2x-3y)(x+4y)-(3x+y)(x-2y)
计算【3(x-y)^2(x+y)^-2/4(x+y)^2(x-y)^-2】^-2
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1