Equações de grau 2

Equações de grau 2

8th Grade

16 Qs

quiz-placeholder

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Equações de grau 2

Equações de grau 2

Assessment

Quiz

Mathematics

8th Grade

Practice Problem

Medium

CCSS
HSA.REI.B.4, HSA.REI.A.1

Standards-aligned

Created by

maria marraomartins

Used 18+ times

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16 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

O valor de (x + 2y)2 é:

x2 + 4xy + 2y2

x2 + 2xy + 2y2

x2 + 4xy + 4y2

x2 - 4xy + 2y2

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Qual o desenvolvimento correto de (x - 7)² ?

x² - 49

x² + 14x + 49

x² - 14x - 49

x² - 14x + 49

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

(2p + q)² é igual a:

4p² + 2q + q²

p² + 4pq + q

q² + 4pq + 4p²

2p² + 2pq + 2q²

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Desenvolvendo algebricamente o produto (x + 5).(x - 5) obtemos

2x

x2

x2 + 25

x2 - 25

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Quanto vale o produto (40 + 1).(40 - 1)?

159

1599

1600

1601

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Colocando o fator comum em evidência na expressão ax + ay temos:

a . ( x + y )

ax . ( 1 + y )

ay . ( x + 1 )

não tem fator comum

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Ao fatorizar

9x2 - 25 obtemos:

( 3x + 5 ) . ( 3x + 5 )

( 3x + 5 ) . ( 3x - 5 )

(3x - 5 ) . ( 3x - 5)

( 3x - 5 )2

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