x的平方乘以y除以x的三次方加上y的三次方-搜答案-搜搜考试网

x^2+2x+y^2-6y+10=0可以化解为（x+1)^2+(y-3)^2=0,等价于x+1=0且y-3=0,所以有x=-1,y=3,故x^3*y=-3.

x+y=7x^2+y^2=55(x+y)^2=x^2+y^2+2xy=492xy=49-55=-6,xy=-3（x^3）·（y^3）=(xy）^3=(-3)^3=-27

(-a)²=a²所以原式=(2x+y)³/(2x+y)²=2x+y

x^3y-2x^2y^2+xy^3=x^3y+2x^2y^2+xy^3-4x^2y^2=xy(x^2+2xy+y^2)-4x^2y^2=xy(x+y)^2-4x^2y^2=12×7×7-4×12×12

原式=（4x的3次方+2x的4次方y）÷x的2次方=（4x的3次方÷x的2次方）+（2x的4次方y÷x的2次方）=4x+2x的2次方y=4x+2x²y

(x²-xy²+y³)/(x²-y²)不能继续化简

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

x^3+3x^2-3x-9=0x^2(x+3)-3(x+3)=0(x+√3)(x-√3)(x+3)=0所以x=-√3或x=√3或x=-3

(x-y）³×（x-y）²×（y-x）=（x-y）³×（x-y）²×[-(x-y)]=-（x-y）的6次方

先分解因式,后乘法.(X^4-Y^4)/(X^3+X^2Y+XY^2+Y^3)=(X-Y)(X+Y)(X^2+Y^2)/(X^3+X^2Y+XY^2+Y^3)=(X-Y)(X^3+X^2Y+XY^2+

原式=4(x-y)^3*(-1/8)(x-y)^6=-(1/2)(x-y)^9

1、-(X-Y)的8次方2、-（A-B-C)的6次方都是偶次方是不是可以化为正呢?!

(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

(x²)³×x²×(2x)²=x^6×x²×4x²=4x^(6+2+2)=4x^10

解题思路：把分式的分子分母分解因式再根据法则进行计算，能约分的要先约分解题过程：答案见附件

这个是最简了,不能化简

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

(-2x^my^3)*(3x^3*y^2)*(5x^2y^n)=-30x^4y^3-30x^(m+3+2)y^(3+2+n)=-30x^4y^3m+3+2=4m=-13+2+n=3n=-2

(x+y)(x^2-xy+y^2)

原式=x平方×x三次方+x五次方=x五次方+x五次方=2x五次方望采纳!祝你学习进步!