因式分【解析】
2m2-8n2= .
考点分析:
相关试题推荐
函数y=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192408564814024/SYS201311011924085648140008_ST/0.png)
的自变量x取值范围是
.
查看答案
已知:如图,点P是正方形ABCD的对角线AC上的一个动点(A、C除外),作PE⊥AB于点E,作PF⊥BC于点F,设正方形ABCD的边长为x,矩形PEBF的周长为y,在下列图象中,大致表示y与x之间的函数关系的是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192408564814024/SYS201311011924085648140007_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192408564814024/SYS201311011924085648140007_ST/images1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192408564814024/SYS201311011924085648140007_ST/images2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192408564814024/SYS201311011924085648140007_ST/images3.png)
D.
查看答案
已知抛物线y=ax
2+bx+c(a<0)过A(-2,0)、B(0,0)、C(-3,y
1)、D(3,y
2)四点,则y
1与y
2的大小关系是( )
A.y
1>y
2B.y
1=y
2C.y
1<y
2D.不能确定
查看答案
下列四个函数图象中,当x>0时,y随x的增大而增大的是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192408564814024/SYS201311011924085648140005_ST/images0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192408564814024/SYS201311011924085648140005_ST/images1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192408564814024/SYS201311011924085648140005_ST/images2.png)
D.
查看答案
已知粉笔盒里只有2支黄色粉笔和3支红色粉笔,每支粉笔除颜色外均相同,现从中任取一支粉笔,则取出黄色粉笔的概率是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192408564814024/SYS201311011924085648140004_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192408564814024/SYS201311011924085648140004_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192408564814024/SYS201311011924085648140004_ST/2.png)
D.
查看答案