Câu 1. [NB] Cho phương trình , đặt b = 2b' . Điều nào sau đây là đúng?

công thức nghiệm thu gọn

Quiz
•
Mathematics
•
9th Grade
•
Easy
Hanh Hanh
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 2. [NB] Cho phương trình . Các hệ số a; b'; c lần lượt bằng
a= 4; b'= 2; c= 1
a= 4; b'=-2; c= 1
a= 1; b'= 2; c= 4
a= 2; b'= -2; c= 1
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
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MULTIPLE CHOICE QUESTION
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MULTIPLE CHOICE QUESTION
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MULTIPLE CHOICE QUESTION
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