(x-2y)x的三次方-(y-2x)y的三次方
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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