(-2x)(2x+1) (-3x+2y)(-3x-2y) (-4x+3y)的平方 (x+2y)(-x-2y)
化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方
先化简再求值(x-y)(x+y)-(x-2y) 的完全平方+x(3x-5y)-(x-y)(x-2y),其中x=1/2 y
2(y-x)的平方-7(x-y)+6(x-y)-3(y-x)的平方
(X-3Y)(X+3Y)-(X+2Y)(X-4Y)-(2X-Y)2的平方
(1)(2x-3y)的平方-(y+3x)(3x-y) (1~4是计算) (2)[(x-y)的平方+(x+y)的平方](x
(-2x)(2x+1) (-3x+2y)(-3x-2y) (-4x+3y)的平方 (x+2y)(-x-2y)
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)+【-
1、x(x-y)(x+y)-x(x+y)^2
x/x-y*y^2/x+y-x^3y2/x^4-y^4/x^2/x^2+y^2
【x-3y][x+y]-[x-2y][x +2y]-[x-y
[(3x+y)(x-y)-(2x+3y)(x-y)]*(x-y)
(x+y)(x-y)-(2xy+3y)平方