(9x^2+4y^2)(3x+2y)(3x-2y)
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
(x+3y-4)(2x-y)
(X-3Y)(X+3Y)-(X+2Y)(X-4Y)-(2X-Y)2的平方
x/x-y*y^2/x+y-x^3y2/x^4-y^4/x^2/x^2+y^2
(2x+y)(2x-3y)+x(2y+y) 2a(x-y)-4b(x-y)
化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方
【x-3y][x+y]-[x-2y][x +2y]-[x-y
[(3x+y)(x-y)-(2x+3y)(x-y)]*(x-y)
有这样一道题:"计算(2*x*x*x-3*x*x*y-2*x*y*y)-(x*x*x-2*x*y*y+y*y*y)+【-
(3x-2y)×(3x+2y)×(9x+4y)
计算【3(x-y)^2(x+y)^-2/4(x+y)^2(x-y)^-2】^-2
(2x-y)(2x+y)-2(3x-4y)(4y+3x)