
แบบทดสอบย่อย 2
Authored by 137 Damrongrit
Mathematics
8th Grade
Used 1+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
จงหาค่าของ x2 + 6x + 9 = 0
x = -3
x = 3
x = 1, 9
x = -3, 3
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
จงหาค่าของ 9x2 - 18x = 0
x = 0, 2
x = 0, -2
x = 2, 9
x = 3, 6
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
จงหาค่าของ 3x2 -2x = 8
x = 4, 2
x = 4, 8
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
x = 7 เป็นคำตอบของข้อใดข้อใด
x2 - 14x + 49 = 0
x2 + 18x + 87 = 0
x2 - x - 56 = 0
x2 - 14x + 49 = 0
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
x = 4,7 เป็นคำตอบของข้อใด
x2 - 6x - 7 = 0
x2 + 9x + 14 = 0
x2 - 3x - 28 = 0
x2 - 11x + 28 = 0
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
จงหาค่าของ y2 + 3y - 18 =0
y = -6, 3
y = 2, -9
y = -8, 4
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
จงหาคำตอบของ 3a2 + 12a + 9 = 0
a = -3, -3
a = -3, -1
a = 3, 1
a = 3, 3
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