Định Lý Viete
Quiz
•
Mathematics
•
1st - 12th Grade
•
Medium
Standards-aligned
Sơn Nguyễn Ngọc
Used 3+ times
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30 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Biệt thức ' của phương trình 4 - 6x - 1 = 0 là:
13
20
5
25
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho hai số a = 3; b = 4. Hai số a, b là nghiệm của phương trình nào trong các phương trình sau?
x2 + 7x -12 = 0;
x2 - 7x -12 = 0;
x2 + 7x +12 = 0;
x2 - 7x +12 = 0;
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hiệu hai nghiệm( nghiệm lớn - nghiệm nhỏ) của phương trình + 2x - 5 = 0 bằng :
-
-2
0
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Phương trình + 2x + m -2 = 0 vô nghiệm khi :
m > 3
m < 3
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Giá trị của m để phương trình 2 – 4x + 3 m = 0 có hai nghiệm phân biệt là:
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Tích hai nghiệm của phương trình: -15x2 + 225x + 75 = 0 là:
15
-5
-15
5
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho phương trình bậc hai x2 - 2( 2m+1)x + 2m = 0. Hệ số b' của phương trình là:
m+1
m
2m+1
- (2m + 1)
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