Công thức nghiệm thu gọn

Công thức nghiệm thu gọn

9th Grade

14 Qs

quiz-placeholder

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Công thức nghiệm thu gọn

Công thức nghiệm thu gọn

Assessment

Quiz

Mathematics

9th Grade

Hard

Created by

Thu Nguyễn

Used 59+ times

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14 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Câu 1.          [NB] Cho phương trình  ax2+bx+c=0ax^2+bx+c=0    , đặt b = 2b' . Điều nào sau đây là đúng?

 Δ=b24ac\Delta'=b'^2-4ac  

 Δ=2Δ\Delta=2\Delta'  

 Δ=b2ac\Delta'=b'^2-ac  

 Δ=b2ac\Delta'=b^2-ac  

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Câu 2. [NB] Cho phương trình   4x24x+1=04x^2-4x+1=0   . 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

Media Image

A

B

C

D

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

A

B

C

D

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

A

B

C

D

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

A

B

C

D

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

A

B

C

D

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