(x-y)^2-(2x-y)^2 4x^2-nxy+9y^2

来源：学生作业帮编辑：拍题作业网作业帮分类：数学作业时间：2024/05/24 01:47:11

(x-y)^2-(2x-y)^2
=[(x-y)-(2x-y)][(x-y)+(2x-y)]
=(-x)(3x-2y)
=-x(3x-2y)
4x^2-nxy+9y^2 (n=12 )
4x^2-12xy+9y^2
=(2x-3y)^2

(x-y)^2-(2x-y)^2 4x^2-nxy+9y^2 （mx+y）（x-y）=2x的平方+nxy-y的平方,求m,n的值 x^2-y^2/x+y-4x(x-y)+y^2/2x-y, 1、x(x-y)(x+y)-x(x+y)^2 已知4x=9y求(1)x+y/y (2)y-x/2x (2x-y)^2-4(x-y)(x+2y) (2x-y)²-4(x-y)(x+2y) 化简：（2x-y)²-4(x-y)(x+y) {(z+y)(x-y)-(x-y)的2次方+2y(x-y)}除以4y x+2y+4y^2/x-y+4x^y/4y^2-x^2 (1)(x^2/x)-y-x-y 4x(y-x)-y^2因式分解