(x-y)的2次方承一(y-x)的5次方-搜答案-神马作文网

6xy³-9x²y²-y^4=-y²(-6xy+9x²+y²)=-y²[(3x)²+2×3x×(-y)+(-y)&sup

(x-y)的2次方-2(x-y)+(x-y)-5(x-y)=(x-y)²-2(x-y)+(x-y)-5(x-y)=(x-y)²-(x-y)-5(x-y)=(x-y)²-6

[2(x一y)³一8(x一y)²(x+y)+6y(x一y)²]÷2(x一y)²=(x一y)一4(x+y)+3y=x-y-4x-4y+3y=-3x-2y再答：不客

(x-y)(z+y-x+y+2y)÷4y=(x-y)(z-x+4y)÷4y{(x+y)(x-y)-(x-y)的2次方+2y(x-y)}除以4y=(x-y)(x+y-x+y+2y)÷4y=(x-y)(4

解题思路：本题目主要考查指数的运算，其中的关键是通过提取负号把y-x转化成-（x-y)解题过程：

(x-y)²+3(y-x)=(x-y)²-3(x-y)=(x-y)[(x-y)-3]=(x-y)(x-y-3)

y(x+y)+(x+y)(x-y)-x的2次方,其中X=-2,y=2分之一y(x+y)+(x+y)(x-y)-x的2次方=(x+y)(y+x-y)-x=x(x+y)-x=x(x+y-1)=-2*(-2

(x-y）的3次方乘（y-x）的2次方乘（y-x）的5次方=(x-y）的3次方乘（x-y）的2次方乘（y-x）的5次方=（x-y）的5次方乘（y-x）的5次方=-（x-y）的10次方

再问：确定吗再答：绝对确定，我做过很多这种题再答：求采纳再问：最后答案是-12吗再答：对啊再问：还有一题再答：在哪再问：9(b一a)的3次方(x一y)一2(a一b)的2次方(y一x)的公因

再答：不客气。

解原式=(x^2+y^2)-(xy)^2=(x^2+xy+y^2)(x^2-xy+y^2)

原式=2y(x-y)²+4y²(x-y)³=2y(x-y)²[1+2y(x-y)]=2y(x-y)²(2xy-2y²+1)原式=(m-n)&

8x^3y^3×(-2xy)^3=8x^3y^3×(-8x^3y^3)=-64x^6y^6

(x+3y)(x-3y)(x²-9y²）=(x²-9y²)(x²-9y²)=(x²-9y²)²=x^4-18x

(x+y)的平方+2*4(x+y)+4的平方(x+y)=(x+y+4)的平方

(x一Y）的5次方除以（X一Y）的3次方=（X一Y）的2次方

【(x-y)的3次方-8(x-y)的2次方(x+y)+6y(x-y)的平方】/2(x-y)的平方=(x-y)²[x-y-8(x+y)+6y]/2(x-y)²=1/2（x-y-8x-

(x—y)的2次方×（x—y)的5次方×（y-x)=-(x-y)的2次方×（x-y)的5次方×（x-y)=-(x-y)的(2+5+1)次方=-(x-y)的8次方

=y^3/X*1/2y=y^2/2x

9(x+2y)的2次方-25(x-2y)的2次方=[3(x+2y)+5(x-2y)][3(x+2y)-5(x-2y)]=(3x+6y+5x-10y)(3x+6y-5x+10y)=(8x-4y)(16y