IG2Ashley班周测-week13
Authored by 榆婷 陈
Mathematics
8th Grade
Used 1+ times
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23 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列因式分解正确的是（ ）
2a²﹣4a＝2（a²+a）
﹣a²+4＝(a+2)(2﹣a)
a²﹣10a+25＝a（a﹣10）+25
a²﹣2a+1＝（a+1）²
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列各式从左到右的变形为分解因式的是（ ）
x（x﹣y）＝x²﹣xy
x²+2xy+1＝x（x+2y）+1
（y﹣1）（y+1）＝y²﹣1
x（x﹣3）+3（x﹣3）＝（x+3）（x﹣3）
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
若 有意义，则实数x的取值范围是（ ）
x≥﹣2
x≠﹣2
x≠0
x≠2
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
将分式 中的m、n都扩大为原来的3倍，则分式的值（ ）
不变
是原来的3倍
是原来的9倍
是原来的6倍
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列分式中是最简分式的是（ ）
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
若分式 的值为零，则x的值是（ ）
±1
1
﹣1
0
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
化简的结果是（ ）
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