x的平方乘y除以x的三次方加y的三次方-搜答案-神马作文网

x³-y³=(x-y)(x²+xy+y²)所以是乘x-y

[8x^3y^3-(-xy^2)^2]/a=-x^2y^2+1/8*xy^3a=(8x^3y^3-x^2y^4)/(1/8*xy^3-x^2y^2)=-8xya/4x=-2y

X³+Y³=(X+Y)(X²-XY+Y²)

1、(x+y)乘(x-y)的三次方+(x+y)的三次方乘(y-x)=（x+y)(x-y)((x-y)²-(x+y)²)=（x+y)(x-y)(x-y+x+y)(x-y-x-y)=-

因为X平方乘Y的三次方＜0所以y小于0x不等于0所以-0.5x的五次方乘（-Y的7次方）小于0所以|-0.5x的五次方乘（-Y的7次方）|=-1/2x^5*y^7所以-2XY乘|-0.5x的五次方乘（

(-a)²=a²所以原式=(2x+y)³/(2x+y)²=2x+y

原式=（4x的3次方+2x的4次方y）÷x的2次方=（4x的3次方÷x的2次方）+（2x的4次方y÷x的2次方）=4x+2x的2次方y=4x+2x²y

(x²-xy²+y³)/(x²-y²)不能继续化简

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

由ly-2l+(x-1)的平方=0得y-2=0,x-1=0；则y=2,x=1；x的三次方-x的平方y+x乘y的平方+x的平方y-x乘y的平方-y的三次方=1-8=-7

8(x-y)的四次方乘(x+y)的三次方除以27[(x+y)乘(x-y)]的三次方=(8/27)×(x-y)^(4-3)×(x+y)^(3-3)=(8/27)×(x-y);您好,很高兴为您解答,sky

(x-y)²(y-x)³(x-y)=(x-y)²[-(x-y)³](x-y)=-(x-y)的(2+3+1)次方=-(x-y)的6次方很高兴为您解答,【学习宝典】

x+y=1则x^2+y^2+2xy=1因为x^2+y^2=3则xy=-1x^3+y^3=(x+y)(x^2-xy+y^2)=1*(3+1)=4

先分解因式,后乘法.(X^4-Y^4)/(X^3+X^2Y+XY^2+Y^3)=(X-Y)(X+Y)(X^2+Y^2)/(X^3+X^2Y+XY^2+Y^3)=(X-Y)(X^3+X^2Y+XY^2+

带入x=2,y=1,最后得出-4

这个是最简了,不能化简

原式=[x/(x-y)]*[y^2/(x+y)]-[x^4y/(x^2+y^2)(x^2-y^2)]/[x^2/(x^2+y^2)]=xy^2/(x^2-y^2)-x^2y/(x^2-y^2)=xy(

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

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

题目是不是(x^3+y^3)/(x+y)?应该等于x^2+xy+y^2