x²-4y² x+2y---------- ÷ --------分数线x²+2xy+y² x²+xyx²-4y² x+2y----------÷--------分数线x²+2xy+y² x²+xy(x+2y)(x-2y)x(x+y)=----------------(x+y)(x+y)(x+2y)(x-y)x=------(x+y)这样对了吗?

来源：学生作业帮助网 编辑：作业帮 时间：2024/11/20 07:20:41
x²-4y² x+2y---------- ÷ --------分数线x²+2xy+y² x²+xyx²-4y² x+2y----------÷--------分数线x²+2xy+y² x²+xy(x+2y)(x-2y)x(x+y)=----------------(x+y)(x+y)(x+2y)(x-y)x=------(x+y)这样对了吗?
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x²-4y² x+2y---------- ÷ --------分数线x²+2xy+y² x²+xyx²-4y² x+2y----------÷--------分数线x²+2xy+y² x²+xy(x+2y)(x-2y)x(x+y)=----------------(x+y)(x+y)(x+2y)(x-y)x=------(x+y)这样对了吗?
x²-4y² x+2y
---------- ÷ --------分数线
x²+2xy+y² x²+xy
x²-4y² x+2y
----------÷--------分数线
x²+2xy+y² x²+xy
(x+2y)(x-2y)x(x+y)
=----------------
(x+y)(x+y)(x+2y)
(x-y)x
=------
(x+y)
这样对了吗?

x²-4y² x+2y---------- ÷ --------分数线x²+2xy+y² x²+xyx²-4y² x+2y----------÷--------分数线x²+2xy+y² x²+xy(x+2y)(x-2y)x(x+y)=----------------(x+y)(x+y)(x+2y)(x-y)x=------(x+y)这样对了吗?
[(x^2-4y^2)/(x^+2xy+y^2)]/[(x+2y)/(x^2+xy)]
=[(x-2y)(x+2y)/(x+y)^2]/[(x+2y)/x(x+y)]
=(x-2y)(x+2y)/(x+y)^2*x(x+y)/(x+2y)
=(x-2y)(x+2y)/(x+y)*x/(x+2y)
=(x-2y)/(x+y)*x
=x(x-2y)/(x+y)

计算x²-x/x²×x/1-x和x²-4y²/x²+2xy+y²÷x+2y/x²+xy 怎么算啊这个：X²+4X+Y²-2Y+5=0 则X²+Y²=?²²²²²²²²²²²²X²+4X+Y²-2Y+5X=0 则X²+Y²=? x²-4y²/x²+2xy+y²÷x+2y/2x²+2xy 因式分解2x(x-y)^4 - x²(x-y)² + xy(y-x)²RT 计算：4xy²-3x²y-{3x²y-[2xy²-4x²y+2(x²y-2xy²)]急 化简再求值[(x²+y²）²-4x²y²]÷(x²-y²）其实,x=2,y=2/3. （3x-2y)²(3x-2y)²(9x²+4y²）² 4m²（2x-3y)²-m²（3x-2y)²=? 14x²-2y²是4x²-y²的几倍? 1.(x+y)²-4xy=( )²2.x²-（ ）+25y²=（ )²3.x²-8x²y²+16y四次方=（ ）²4.7.2²-2.8²= . x²-4y²+x-2y因式分解 x²-4y²+x+2y因式分解 (x²-4y²)-(x+2y)怎样因式分解? 4x²-y²+2x-y 因式分解 x²-4y²-x-2y 分解因式 x²-x-4y²+2y (x²-y)²-(2y-2)²^4表示4次方9x^4-36y²(a²-2b)²-(1-2b)² x²-4y² x+2y---------- ÷ --------分数线x²+2xy+y² x²+xyx²-4y² x+2y----------÷--------分数线x²+2xy+y² x²+xy(x+2y)(x-2y)x(x+y)=----------------(x+y)(x+y)(x+2y)(x-y)x=------(x+y)这样对了吗?