20220415_2次方程式-因数分解利用
Quiz
•
Mathematics
•
9th Grade
•
Practice Problem
•
Hard
Takayuki Yokoi
Used 4+ times
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8 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
① x2-5x-14=0
x=2,7
x=2,-7
x=-2,7
x=-2,-7
解なし
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
② x2+9x+20=0
x=4,5
x=4,-5
x=-4,5
x=-4,-5
解なし
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
③ x2=x+72
x=8,9
x=8,-9
x=-8,9
x=-8,-9
解なし
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
④ x^2-121=0
x=11
x=-11
x=±11
x=±121
解なし
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
⑤ x2+18x+81=0
x=9
x=-9
x=±9
x=0,9
その他
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
⑥ 4x2-4x+1=0
x=2
x=-2
x=1/2
x=-1/2
その他
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
⑦ x2+2x=0
x=2
x=-2
x=±2
解なし
その他
8.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
⑧ 3x2-8x+4=0
x=2,2/3
x=2,3/2
x=1/2,2/3
x=1/2,3/2
その他
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