2x^2y+xy-15y

(-x-y)(x^2+xy+y^2)(-x-y)(x^2+xy+y^2)(-x-y)(x^2+xy+y^2)原式=-x3-2x2y-2xy2-y3楼上的,注意审题,不要乱套公式.原式=-x^3-y^3

化简x^-y^/x^-2xy+y^化简x^-y^/x^-2xy+y^化简x^-y^/x^-2xy+y^(x²-y²)/(x²-2xy+y²)=[(x+y)(x-y)]/(x-y)²=(x+y

2*(x-y)²(y-x)(xy)2*(x-y)²(y-x)(xy)2*(x-y)²(y-x)(xy)=-2xy（x-y）³请问我温热鹅鹅鹅饿呃呃呃呃呃呃呃呃呃

3y/x*x-y*y+x/x*x-2xy+y*y+6y*y/x*x*x-x*x*y-xy*y+y*y*y等于多少?3y/x*x-y*y+x/x*x-2xy+y*y+6y*y/x*x*x-x*x*y-xy*y+y*y*y等于多少?3y/x*x

（x^2+xy/x-y)/（xy/x-y)计算（x^2+xy/x-y)/（xy/x-y)计算（x^2+xy/x-y)/（xy/x-y)计算【x²+xy/（x-y）】/【xy/（x-y）】=【x²（x-y）/（x-y）+x

多项式2*x*x-xy-15*y*y分解因式多项式2*x*x-xy-15*y*y分解因式多项式2*x*x-xy-15*y*y分解因式十字相乘法251-3(2x+5y)(x-3y)(2x+5y)+(x-3y)2*x*x-xy-15*y*y=（

x^2+xy=12,xy+y^2=15,求(x+y)^2-(x+y)(x-y)x^2+xy=12,xy+y^2=15,求(x+y)^2-(x+y)(x-y)x^2+xy=12,xy+y^2=15,求(x+y)^2-(x+y)(x-y)(x+

x^2-xy/xy-y^2约分x^2-xy/xy-y^2约分x^2-xy/xy-y^2约分

.(x+y-2)(x+y-2xy)+(xy-1)^2.(x+y-2)(x+y-2xy)+(xy-1)^2.(x+y-2)(x+y-2xy)+(xy-1)^2令x=1得f(x,y)=0；知有因式（x-1）,代入x=1时得到-（y-1）^2+(

(x^2-xy)y÷y-x/xy怎么做?(x^2-xy)y÷y-x/xy怎么做?(x^2-xy)y÷y-x/xy怎么做?=xy(x-y)×[-xy/(x-y)]=-(xy)²=-x²y²

6x^2y^2+xy-156x^2y^2+xy-156x^2y^2+xy-156x²y²+xy-15=(2xy-3)(3xy+5)2-335-910=(2xy-3)(3xy+5)

X-Y/2X+2YXY/X+Y²X-Y/2X+2YXY/X+Y²X-Y/2X+2YXY/X+Y²一、判断下面每组的两个分数是否相等,并说明理由.6分之5和30分之1515分之5和5分之124分之8和3分之24分

因式分解：x×x-xy-2y×y-x-y因式分解：x×x-xy-2y×y-x-y因式分解：x×x-xy-2y×y-x-y(x+y)(x-y)-x(y+1)-y(y+1)=(x+y)(x-y)-(x+y)(y+1)=(x+y)(x-2y-1)

x^2y-2xy+y化简x^2y-2xy+y化简x^2y-2xy+y化简x^2y-2xy+y=y(x^2-2x+1)=y(x-1)^2

X^Y-2XY^2+y^3X^Y-2XY^2+y^3X^Y-2XY^2+y^3x^2y-2xy^2+y^3=y(x^2-2xy+y^2)=y(x-y)(x-y)=y(x-y)^2

x-y/xy-y^2计算x-y/xy-y^2计算x-y/xy-y^2计算解(x-y)/(xy-y²)=(x-y)/y(x-y)=1/y

因式分解：x方y+2xy+y因式分解：x方y+2xy+y因式分解：x方y+2xy+yx^2y+xy+xy+y=xy(x+1)+y(x+1)=(x+1)(xy+1)y(x+1)^2

2根号XY×根号Y\X(Y2根号XY×根号Y\X(Y2根号XY×根号Y\X(Y2根号XY×根号Y\X(Y2根号XY×根号Y\X(Y=2√(XY×Y\X)=2√Y²=-2Y5根号45×2\3根号2\3=5×3√5×2\3×√6/3=

因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y)因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y)因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y)12xy^2(y-

(x-y)[(x+y)^2-xy]+(x-y)[(x-y)^2+xy](x-y)[(x+y)^2-xy]+(x-y)[(x-y)^2+xy](x-y)[(x+y)^2-xy]+(x-y)[(x-y)^2+xy]解原式=(x-y)[(x+y)