(x h)的三次方减去x的三次方除以h的极限是-搜答案-神马作文网

(-1/2*xy²)³-1/6*x(xy³)²=-1/8*x³y^6-1/6*x³y^6=-7/24*x³y^6

X³+Y³=(X+Y)(X²-XY+Y²)

原式=(8x^6-6x^6-12x^5)÷(-2x²)=(2x^6-12x^5)÷(-2x²)=-x^4+6x³再问：=(2x^6-12x^5)÷(-2x²)=

x^3-8x^2+19x-12=0(x^3-x)-(8x^2-20x+12)=0x(x^2-1)-4(2x^2-5x+3)=0x(x+1)(x-1)-4(x-1)(2x-3)=0(x-1)(x^2+x

(a-b)(a平方+ab+b平方).

1.(-2x²)³-(-x³)²=-8x^6-x^6=-9x^62（-x）^8×（y^6）^(1/2)（x⁴×y⁴）²×y&#

7x^3-6x^3y+3x^2y+3x^3+6x^3y-3x^2y-10x^3,其中x=-2010.y=2012=(7x^3+3x^3-10x^3)+(6x^3y-6x^3y)+(3x^2y-3x^2

(-3)^3-(-3)+1-(-3)^2=-27+3+1-9=-32

=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^3-y^3=x^3-x^2y+y^2x-yx^2+xy^2-y^3=x^2(x-y)+xy(y-x)+y^2(x-y)=(x-y)(x^2-xy+y^2)

x³y-xy³=xy(x²-y²)=xy(x+y)(x-y)

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

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)&

a^3-b^3=a*a^2-b*b^2+a*b^2-a*b^2补上两项,便于化简=a(a^2-b^2)+(a-b)*b^2平方差公式=a(a+b)(a-b)+(a-b)*b^2提取公因子=（a-b)(

17x的9次方,上式为2x的9次方-64x的9次方+81x的9次方

（x+y）^3-x^3-y^3+3xy=（x+y）^3-（x+y)(x²-xy+y²）+3xy=(x+y)(x²+2xy+y²-x²+xy-y

x^3-2x^2+1=0(x-1)(x^2-x-1)=0x-1=0即x=1或x^2-x-1=0x^2-x-1=0(x-1/2)^2=5/4x-1/2=±√5/2x=(1+√5)/2或x=(1-√5)/