x三次方符号-搜答案-智慧作业帮

用到公式a^3+b^3=(a+b)(a^2-ab+b^2)x^3+(1/x)^3=(x+1/x)[x^2-1+(1/x)^2]

X³+Y³=(X+Y)(X²-XY+Y²)

(a-b)(a平方+ab+b平方).

(x+y+z)^3-x^3-y^3-z^3=(x+y+z)^3-x^3-(y^3+z^3)=(x+y+z-x)[(x+y+z)^2+x(x+y+z)+x^2]-(y+z)(y^2-yz+z^2)=(y

令t=x^(1/3),x=t^3,dx=3t^2dt故原式=∫1/(t+1)*3t^2dt=∫3(t^2-1+1)/(t+1)dt=3∫(t-1)dt+3∫1/(t+1)dt=3(t^2/2-t)+3

x三次方+8=（x+2)(x^2-2x+4)

原式＝(x-y)^4(x-y)(x-y)^3=(x-y)^4(x-y)^4=2(x-y)^4

=xy(4x²+4xy+y²)=xy(2x+y)²

(x-n)*(x^2+x*n+n^2)

x的三次方+8y三次方=(x+2y)(x平方-2xy+4y平方）

x^2+X-1=0,x^3+x^2-x=x(x^2+x-1)=x*0=0.

x³y-xy³=xy(x²-y²)=xy(x+y)(x-y)

a^3+b^3=(a+b)*(a^2-ab+b^2）.(a,b分别用X,Y代替吧,这是一个立方和公式)不过我感觉应该是最简了吧,如果用立方和来解开的话,计算步骤有会增多

x^3＋x^3＝2x^3x^3－x^3＝0a^2•（－a^4）＝－a^6－a^2•（－a^4）＝a^6－x•x^2＝－x^3(－x)^2•x^3＝x^5

2x³+3x³-4x³=(2+3-4)x³=x³

原式=x^(3/2)×x^(1/3)=x^(3/2+1/3)=x^(11/6)=x×x^(5/6)=x乘以x5次方再开6次方根

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)&

17x的9次方,上式为2x的9次方-64x的9次方+81x的9次方

x三次方-2x平方+x

x^3-2x^2+2=x(x^2-2x+1)=x(x-1)^2