作业帮(x-y)(x-2y)-(3x-2y)(x-3y),其中X=4,Y= -1,先化简,再求值急用啊...x^2-的^是什么呀
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/16 17:25:10
(x-y)(x-2y)-(3x-2y)(x-3y),其中X=4,Y= -1,先化简,再求值急用啊...x^2-的^是什么呀
(x-y)(x-2y)-(3x-2y)(x-3y),其中X=4,Y= -1,先化简,再求值
急用啊...
x^2-的^是什么呀
(x-y)(x-2y)-(3x-2y)(x-3y),其中X=4,Y= -1,先化简,再求值急用啊...x^2-的^是什么呀
(x-y)(x-2y)-(3x-2y)(x-3y)
=x^2-xy-2xy+2y^2-3x^2+2xy+9xy-6y^2
=-2x^2+8xy-4y^2
当X=4,Y= -1时,-2x^2+8xy-4y^2=-2*16-32-4=-68
x(x-y)2-(y-x)3
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
[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：x+2y/x-y+2x/y-x-3y/x-y
化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方
[(3x+y)(x-y)-(2x+3y)(x-y)]*(x-y)
化简y(x+y)+(x+y)(x-y)-x^2
(x+y)(x-y)-(x-y)^2如题 (x+y)(x-y)-(x-y)^2
2X(2X-3Y)-3Y(X+Y)
(-2x y)^2-(3y-x)(-x-3y)
（x+2y)^2-(x+y)(3x-y)
【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y)
计算(x+y)(x+y)^2(-x-y)^3
化简:5(x-y)+2(x+y)-3(x-y)
3x(x-y)+2y(x-y) 计算