x的三次方-x-2＝y怎么画-搜答案-智慧作业帮

X³+Y³=(X+Y)(X²-XY+Y²)

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

(x-y)^3/(y-x)^2=(x-y)^3/[-(x-y)]^2=(x-y)^3/(x-y)^2=x-y再问：还有一道1、已知10的a次方=20,10的b次方=5的-1次方,求9的a次方除以9的2

（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

原式=(x^4+xy³)-(2y^4+2x³y)=x(x³+y³)-2y(x³+y³)=(x-2y)(x³+y³)=(x

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

x²y³-2x(4xy³)=x²y³-2x²y³=-x²y³

就是y=x²图像,把左边翻下去

=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）

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)

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)&

f(x)=x³任取实数x1,x2,且x1

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

(X+Y)³=X³+3X²Y+3XY²+Y³再问：（x+y）³=x³+3x²y+3xy²+y³再答：