[2括号x减y的三次方-搜答案-灵鹊做题网

x^3-2x^2y^2+xy^3=x(x^2+2xy^2+y^3)很高兴为您解答,【学习宝典】团队为您答题.请点击下面的【选为满意回答】按钮,

X³+Y³=(X+Y)(X²-XY+Y²)

6(x-y)^3+15(y-x)^2-9(y-x)^3=6(x-y)^3+15(x-y)^2+9(x-y)^3=15(x-y)^3+15(x-y)^2=15(x-y+1)(x-y)^2

x⁴-2y⁴-2x³y+xy³=(x+y)(x-2y)(x²-xy+y²)

6.联立a-b=30,b-c=25,两式相加,得a-c=55,a方-b方=1650可拆分成（a+c)(a-c)=1650,除以前面得出来的就是a+c=305.既然无意义,说明y-5为0,就是y为5,x

（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

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

(2x^4)y³－x³y^4=(x³y³)(2x－y)=(xy)³(2x－y)=4³×(1/16)=4

原式=4(x-y)^3*(-1/8)(x-y)^6=-(1/2)(x-y)^9

x²y³-2x(4xy³)=x²y³-2x²y³=-x²y³

=xy(4x²+4xy+y²)=xy(2x+y)²

这个是最简了,不能化简

x³y-xy³=xy(x²-y²)=xy(x+y)(x-y)

y=(x-2)^3-x^3y'=3(x-2)^2-3x^2=12(1-x),y'(1)=0,驻点x=1y''=-12y(1)=-2是唯一的极值,是极大值,故也是最大值.

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

将X-ZY看作是一个整体,相应再加减,则系数应为2-7+1,在三次的地方,负负为正.则为负4,-4（x-2y)³+3*4y²,还可以展开得到

x³y³－2x²y²＋xy＝xy（x²y²－2xy＋1）＝xy（xy－1）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)&

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