-9x三次方y二次方-6x二次方y二次方 3xy-搜答案-大师作文网

(x-y)五次方(x+y)四次方÷(y-x)三次方÷(x+y)二次方+(x平方+y平方)二次方=-（x-y)^2(x+y)^2+(x^2+y^2)^2=(x^2+y^2)^2-(x^2-y^2)^2=

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

原式=-3x²y-10x^3+3x^3+6x^3y+3x²y-6x^3y+7x^3=0很明显,代数式的值与x,y无关

=x^4+y^4-2x^2y^2-x^4+y^4=2y^4-2x^2y^2

再问：谢谢大神再答：有问题继续密我

x四次方-6x三次方+9x二次方分之x二次方-3x=x(x-3)/x²（x²-6x+9）=(x-3)/x(x-3)²=1/x(x-3)=1/(x²-3x)如追加

-x^4+x^2y^2=x^2(y^2-x^2)=x^2(y+x)(y-x)xy^3-2x^2y^2+x^3y=xy(y^2-2xy+x^2)=xy(x-y)^2

(3a/x+y)³*(x²-y²)/(y-x/y+x)²=(3a)³/(x+y)³*(x+y)*(x-y)*(x+y)²/(x-y

3x（x-y）三次方-6y（y-x）二次方=3x(x-y)³-6y(x-y)²=3(x-y)²(x²-xy-2y)

(4x的三次方y+6x的二次方y的二次方-xy的三次方)÷2xy=xy(4x²+6xy-y²)÷2xy=2x²+3xy-0.5y²

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^3-9x=x(x^2-9)=x(x+3)(x-3)16X^4-1=(4x^2+1)(2x+1)(2x-1)6xy^2-9x^2y-y^3=-y(9x^2-6xy+y^2)=-y(3x-y)^2

x的三次方-x的二次方y+xy-y的二次方+x-y=x^2(x-y)+y(x-y)+(x-y)=(x^2+y+1)(x-y)如果本题有什么不明白可以追问,另外发并点击我的头像向我求助,请谅解,

-6a²b(x-y)³×3分之1ab²×(y-x)²=-6a²b(x-y)³×3分之1ab²×(x-y)²=(-6×3分

=(x^2)(y^2)(7y-8xz)/(8x^2*y^2)=7y/8-xz

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

由x²y²×（-xy³）²=x²y²x²y^6=x^4y^8.即x的4次方y的8次方.

-3X的5次方Z再问：确定吗再答：这可以确定的，只要你没给错题

结果是3（x-y）的2次方与（2x-5y）的积3（x-y）的2次方乘以2（x-y）-3（x-y）乘以3y,提取3（x-y）的2次方得3（x-y）的2次方乘以（2x-2y-3y）,合并得：3（x-y）的