xy-y² x² 2xy y²÷x²-2xy y² xy y²

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/12 15:11:10
xy-y² x² 2xy y²÷x²-2xy y² xy y²
计算:(x+y/x-y)÷(xy+x^2)

等于1/X*(X-Y)

化简(x-yx2-2xy+y2-xy+y2x2-y2)•xyy-1= ___ .

原式=[x-y(x-y)2-y(x+y)(x+y)(x-y)]•xyy-1=(1x-y-yx-y)•xyy-1=1-yx-y•xyy-1=-xyx-y.故答案是:-xyx-y.

因式分解:x³-5x²y-24xy²

解题思路:提取公因式进行分解解题过程:附件最终答案:略

已知:x+y=6,xy=-3,则 xyy+yxx=

将xy提取公因式变成:xy(x+y)=-3*6=-18

x²-6xy+9y²???因式分解

解题思路:本题主要利用完全平方公式进行因式分解即可求出结果解题过程:解:x²-6xy+9y²=(x-3y)2

(xy-x^2)乘以(xy)/(x-y)

对.前提是x不等于y

计算:4xy-(x+y)^2/xy(x+y)(x-y)÷x^2+xy-2y^2/x^2y+2xy^2

4xy-(x+y)^2/xy(x+y)(x-y)÷x^2+xy-2y^2/x^2y+2xy^2=(4xy-x²-2xy-y²)/[xy(x+y)(x-y)]÷[(x-y)(x+2y

(x^2-xy)y÷y-x/xy怎么做?

=xy(x-y)×[-xy/(x-y)]=-(xy)²=-x²y²

(x^2+xy/x-y)/(xy/x-y)计算

【x²+xy/(x-y)】/【xy/(x-y)】=【x²(x-y)/(x-y)+xy/(x-y)】/【xy/(x-y)】={【x²(x-y)+xy】/(x-y)}/【xy

一道数学运算题.根号X的三次+X平方Y+1/4XY+根号1/4X的三次-X平方Y+XYY(意思是Y的平方.).其中X=2

题目是√x^3+X^2y+1/4xy+√(1/4x^3)-X^2y+xy^2如果是:√x^3+X^2y+1/4xy+√(1/4x^3)-X^2y+xy^2=(3/2)√x^3+xy/4+xy^2=(3

计算(xy-y^2)÷x-y/xy

(xy-y^2)÷x-y/xy=y(x-y)×[xy/(x-y)]=xy²

已知3x2+xy-2y2=0,求(x+yx-y+4xyy

原式=[(x+y)2(x-y)(x+y)+-4xy(x-y)(x+y)]×(x+3y)(x-3y)(x+3y)(x-y)=x-3yx+y,由已知得(3x-2y)(x+y)=0,因为x+y≠0,所以3x

XYY的男性产生的精子有X,Y,YY,XY四种类型,比例为1:2:1:2

产生4种配子xyxyyyx有一种y有两种xy1y2xy1xy2y1y2产生的配子如上y1、y2是一个意思所以分为一组xyxyyy=1221

已知x+y=0,x+13y=1,求x²+12xy+13y²的值.

解题思路::∵x+y=0,x+13y=1,解得x=1/12,y=-1/12∴x²+12xy+13y²=1/144-1/12+13/144=14/144-1/12=2/144=1/72解题过程:已知x+

化简:x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y)

[(x-y)/(x+3y)]/[(x^2-y^2)/(x^2+6xy+9y^2)]-xy/(x+y)=(x-y)/(x+3y)*(x+3y)^2/(x-y)(x+y)-xy/(x+y)=(x+3y)/

谁帮我化简:[(x+y)(x-y)-(x+y)^2-2y(x-y)-2xy]÷xy

原式=(x^2-y^2-x^2-2xy-y^2-2xy+2y^2-2xy)/xy=(-6xy)/xy=-6

已知x+y=3,xy=2,求(x-y)²和x²+y²的值(写出具体计算过程)

解题思路:结合完全平方公式进行求解解题过程:答案见附件最终答案:略

xyy-zz=yx 问x.y.z分别是多少

x=1,y=0,z=9首先x、y、z都是个位数xyy可以写成100x+10y+y同理,zz可以写成10z+zyx写成10y+x等式重新代入以上化解后的式子,就是:100x+11y-11z=10y+x合

x-y/x²÷x²-2xy+y²/xy*(xy-x²)

(x-y)/x²÷(x²-2xy+y²)/xy×(xy-x²)=(x-y)/x²÷(x+y)²/xy×x(y-x)=(x-y)²/

在实数范围内因式分解:1 )3x²-8xy+3y² 2 )5x²y²+xy-73 )3x∧4+5x²-2

解题思路:先用十字相乘法、再运用平方差公式可解。解题过程:同学:另两道题目,我一时间没能解答出来,请你再检查一下原题。很抱歉,请你原谅!