早教吧作业答案频道 -->数学-->
x^2-2xy-8y^2
题目详情
x^2-2xy-8y^2
▼优质解答
答案和解析
=x²-2xy(+y²-y²)-8y²
=(x-y)²-9y²
=(x-y)²-(3y)²
=(x-y+3y)(x-y-3y)
=(x+2y)(x-4y)
够详细了吧
=(x-y)²-9y²
=(x-y)²-(3y)²
=(x-y+3y)(x-y-3y)
=(x+2y)(x-4y)
够详细了吧
看了 x^2-2xy-8y^2...的网友还看了以下:
(1)解出下列方程的解:(x^2-x)^2-5(x^2-x)+6=0(2)解出下列方程的解:(x+ 2020-05-22 …
下列实轴长、虚轴长、焦距、焦点坐标、顶点坐标、离心率和渐近线方程(1)x^2-8y^2=32(2) 2020-06-14 …
求1+2+2^2+2^3+2^4+…+2^2014的值.设S=1+2+2^2+2^3+2^4+…+ 2020-07-09 …
1.已知x^2+xy=5,xy+y^2=-4,求:(1)x^2-y^2的值(2)4x^2+xy-3 2020-07-18 …
二元二次方程组:X^2-3xy+2y^2=03X^2+2xy=20X^2-2xy+y^2=259X 2020-08-03 …
xyz=1,x+y+z=2,x^2+y^2+z^2=3,求x,y,z我解:xy=1/z,x+y=2- 2020-10-31 …
分解因式:x²+y²-2xy-8x+8y+16我作了几步就做不下去了,先看看我做的,x²+y²-2x 2020-10-31 …
已知正数x,y,z,满足x^2+4y^2+9z^2=3,求25/(4yz+3xy)+36/(2xy+ 2020-10-31 …
观察下列各式然后回答问题:1-1/2^2=1/2*2/3,1-1/3^2+2/3*4/3,1-1/4 2020-11-01 …
因式分解下列各题!(追加分数)我就剩50分全部奉上!3ax^2-6axx^2(x-y)+y^2(y- 2020-11-08 …