因式分解1 2xy-x方-y方-搜答案-搜狗做题网

xy（m方+n方）-mn（x方+y方）=xym²-mnx²+xyn²-mny²=xm(ym-nx)+yn(nx-ym)=(mx-ny)(my-nx)

-x²y²+4xy³-4y⁴=-y²（x²-4xy+4y²）=-y²（x-2y）²

3x³-5x²y+xy²+y³=3x³-3x²y-2x²y+2xy²-xy²+y³=3x²

2x²-xy-3y²2x-3yxy（2x-3y）（x+y）这是我在静心思考后得出的结论,如果不能请追问,我会尽全力帮您解决的~如果您有所不满愿意,请谅解~

x³+x²y-xy²-y³=x²(x+y)-y²(x+y)=(x+y)(x²-y²)=(x+y)(x+y)(x-y)=(

（x+2y）²-x²-2xy=x²+4y²+4xy-x²-2xy拆开=2xy+4y²化简=2y（x+y）提取公因式如果本题有什么不明白可以追

再问：谢谢大神再答：有问题继续密我

=xy(4x²+4xy+y²)=xy(2x+y)²

原式=x^3+2x^2y+xy^2 =x(x^2+2xy+y^2) =x(x+y)^2再问：x-2��֮x-

x³y-xy³=xy(x²-y²)=xy(x+y)(x-y)

-x三次方y-2x平方y平方-xy三次方=-xy(x²+2xy+y²)=-xy(x+y)²

x的三次方-x的二次方y+xy-y的二次方+x-y=x^2(x-y)+y(x-y)+(x-y)=(x^2+y+1)(x-y)如果本题有什么不明白可以追问,另外发并点击我的头像向我求助,请谅解,

6x^2-12xy+6y^2=6(x^2-2xy+y^2)=6(x-y)^2

再答：再问：这样就分解完了么再答：恩不能继续分解了

12x三次方+12x平方y-3xy平方=3x(4x²+4xy-y²)=3x[(4x²+4xy+y²)-2y²]=3x(2x+y-√2y)(2x+y+√

①x²+2xy+y²-x-y-6=(x+y)²-(x+y)-6=(x+y-3)(x+y+2)②∵x²-3x-1=0,∴x²-1=3x,于是x²

第一题：(x-2y)*x^3-(y-2x)*y^3=x^4-2x^3y-y^4+2xy^3=(x^4-y^4)-2xy(x^2-y^2)=(x^2+y^2-2xy)(x^2-y^2)=(x-y)^2*

（x^2+xy+y^2）^2-4xy（x^2+y^2）=(x^2+y^2)^2+2xy(x^2+y^2)+x^2y^2-4xy(x^2+y^2)=(x^2+y^2)^2-2xy(x^2+y^2)+x^

（1）x方+2xy+y方+x+y-2=(x+y)²+(x+y)-2=(x+y+2)(x+y-1)（2）x方+xy-2y方+2x+7y-3=(x+2y)(x-y)+2x+7y-3=(x+2y-