Equação do 2º grau

Equação do 2º grau

8th Grade

12 Qs

quiz-placeholder

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Equação do 2º grau

Equação do 2º grau

Assessment

Quiz

Mathematics

8th Grade

Practice Problem

Hard

CCSS
HSA.REI.B.4, 6.EE.B.5, 6.EE.B.7

+3

Standards-aligned

Created by

Eliane Costa

Used 115+ times

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12 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Qual o valor do discriminante ( Δ\Delta  ) da equação x² - 4x + 8 = 0 ?

 Δ = b²  4ac\Delta\ =\ b²\ -\ 4ac  

 Δ = 0\Delta\ =\ 0  

 Δ = 16\Delta\ =\ 16  

 Δ=16\Delta=-16  

 Δ=48\Delta=48  

2.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

A solução da equação 3x - 9 = 9 é

x = 2

x = 4

x = 6

x = 8

Tags

CCSS.6.EE.B.5

CCSS.6.EE.B.7

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Qual a solução da equação x² - 5x = 0?

S = {0}

S = {0,5}

S = {-5,0}

S = {5}

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Qual a solução da equação 2x² -18 = 0 ?

S = {- 3 , 3}

S = {- 9 , 9}

S = {3}

S = {9}

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Qual o valor do discriminante ( Δ\Delta  ) da equação x² - 4x + 8 = 0 ?

 Δ = b²  4ac\Delta\ =\ b²\ -\ 4ac  

 Δ = 0\Delta\ =\ 0  

 Δ = 16\Delta\ =\ 16  

 Δ=16\Delta=-16  

 Δ=48\Delta=48  

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 As raízes da equação x214x+24=0x^2-14x+24=0 são:

 12-12  2-2   

 22  e 1212  

 12-12  e  22  

 2-2  e  1212  

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Identifique uma equação do 2°grau incompleta.

0x² + 3 = 0

2x² + x = 9

x² - 8x = 0

x² - x = 3

Tags

CCSS.HSA.REI.B.4

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