(x-2y)x的三次方-(y-2x)y的三次方-搜答案-百度作业网

x三次方(x-2y)+y三次方(2x-y)=x³（x-2y)-y³(x-2y)=(x-2y)(x³-y³)=(x-2y)(x-y)(x²+xy+y&#

X³+Y³=(X+Y)(X²-XY+Y²)

多项式x的四次方-kx的三次方y+2x的平方y-3x的三次方y+y的四次方合并后不含x的三次方项所以-k-3=0所以k=-3如果不懂,祝学习愉快!

（x+y）三次方×（2x+2y）三次方×（3x+3y）三次方=(x+y)³×8(x+y)³×27(x+y)³=216((x+y)的9次方

(x-y)^5/[(y-x)^3(y-x)^2]＝(x-y)^5/[-(x-y)^3(x-y)^2]＝(x-y)^5/[-(x-y)^5]＝-1.

xy的三次方-2x²y²+x的三次方y=xy(y²-2xy+x²)=xy(x-y)²

负的（x-y）的10次方再问：为什么呢？我要过程麻烦你了再答：后面两个（y-x）可以提负号，二次的提出来是正的，三次的是负的。会了吧~

x²y³-2x(4xy³)=x²y³-2x²y³=-x²y³

=xy(4x²+4xy+y²)=xy(2x+y)²

非奇非偶函数定义域x∈【0,+∞）不关于原点对称所以不具备奇偶性

x+y的三次方*x+y的二次方=(x+y)^3(x+y)^2=(x+y)^(3+2)=(x+y)^5

x的三次方+8y三次方=(x+2y)(x平方-2xy+4y平方）

x/(x+y)(x--)^3=x/(x+y)(x--y)^3y/(y+x)(y--x)^2=y(x--y)/(x+y)(x--y)^3.

x³y-xy³=xy(x²-y²)=xy(x+y)(x-y)

1）:(-x-y)(x+y)二次方=-(x+y)(x+y)²=-(x+y)³;2）（y-x）（x-y）的三次方=-(x-y)(x-y)的3次方=-（x-y）的4次方；很高兴为您解答

x(x+2y)(x-2y)

4y(y-x)的2次方-6y(x-y)三次方=4y(x－y)²－6y(x-y)³=2y(x－y)²(2－3x＋3y)【提取公因式2y(x－y)²】

x^3+x-y^3-y=(x^3-y^3)+(x-y)=(x-y)(x^2+xy+y^2)+(x-y)=(x-y)(x^2+xy+y^2+1).x^3-x^2-y^3+y^2=(x^3-y^3)-(x

您好：x的三次方(y-x)的三次方-(x-y)的三次方=x的三次方(y-x)的三次方+(y-x)的三次方=（x³+1）(y-x)³=（x+1）（x²-x+1）(y-x)&

x(x-y)^2-2(y-x)^3把(y-x)^3变为-(x-y)^3原式变为：x(x-y)^2+2(x-y)^3提出公因式(x-y)^2原式变为：(x-y)^2[x+2(x-y)]把后面这项展开原式