(x-2y-z)(x-2y+z)-(x+2y+z)^2此题详细计算过程
来源:学生作业帮 编辑:百度作业网作业帮 分类:数学作业 时间:2024/07/16 15:01:41
(x-2y-z)(x-2y+z)-(x+2y+z)^2此题详细计算过程
![(x-2y-z)(x-2y+z)-(x+2y+z)^2此题详细计算过程](/uploads/image/z/16828655-23-5.jpg?t=%EF%BC%88x-2y-z%EF%BC%89%EF%BC%88x-2y%2Bz%EF%BC%89-%EF%BC%88x%2B2y%2Bz%EF%BC%89%5E2%E6%AD%A4%E9%A2%98%E8%AF%A6%E7%BB%86%E8%AE%A1%E7%AE%97%E8%BF%87%E7%A8%8B)
你好
(x-2y-z)(x-2y+z)-(x+2y+z)^2
=[(x-2y)-z][(x-2y)+z]-[(x+2y)+z]²
=(x-2y)²-z²-[(x+2y)²+2(x+2y)z+z²]
=(x-2y)²-(x+2y)²-2(x+2y)z
=4*x*2y-2xz-4yz
=8xy-2xz-4yz
很高兴为您解答,祝你学习进步!有不明白的可以追问!
如果有其他问题请另发或点击向我求助,答题不易,请谅解.
如果您认可我的回答,请点击下面的【采纳为满意回答】按钮,谢谢!
(x-2y-z)(x-2y+z)-(x+2y+z)^2
=[(x-2y)-z][(x-2y)+z]-[(x+2y)+z]²
=(x-2y)²-z²-[(x+2y)²+2(x+2y)z+z²]
=(x-2y)²-(x+2y)²-2(x+2y)z
=4*x*2y-2xz-4yz
=8xy-2xz-4yz
很高兴为您解答,祝你学习进步!有不明白的可以追问!
如果有其他问题请另发或点击向我求助,答题不易,请谅解.
如果您认可我的回答,请点击下面的【采纳为满意回答】按钮,谢谢!
x,y,z为正实数 x/(2x+y+z)+y/(x+2y+z)+z/(x+y+2z)
(y-x)/(x+z-2y)(x+y-2z)+(z-y)(x-y)/(x+y-2z)(y+z-2x)+(x-z)(y-z
运用乘法公式计算:(x+2y-3z)(x-2y+3z)
x,y,z正整数 x>y>z证明 x^2x +y^2y+z^2z>x^(y+z)*y^(x+z)*z^(x+y)
2x+3y-4z=0.,3x+4y+5z=0,则x+y+z/x-y+z详细的解题过程
{ x+y+z=2 x-z=-2 y+z=1的解(求过程)
化简(y-x)(z-x)/(x-2y+z)(x+y-2z)+(z-y)(x-y)/(x-2z+y)(y+z-2x)+(x
(x-2y+z)(x+y-2z)分之(y-x)(z-x) + (x+y-2z)(y+z-2x)分之(z-y)(x-y)
计算:(x-2y+z)(-x+2y+z)要过程,谢
证明:(y+z-2x)3+(z+x-2y)3+(x+y-2z)3=3(y+z-2x)(z+x-2y)(x+y-2z).
(2x-3y+z)-3{x-2【-z+(x-y)】-(3y-5z)}
化简(y-x)(z-x)/(x-2y+z)(x+y-2z)+(z-y)(x-y)/(xy-2z)(y+z-2x)+(x-