casos notáveis

casos notáveis

8th Grade

6 Qs

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casos notáveis

casos notáveis

Assessment

Quiz

Mathematics

8th Grade

Medium

Created by

Isabel Correia

Used 18+ times

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6 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Qual dos seguintes polinómios é equivalente à expressão (x7)2\left(x-7\right)^2 

 x249x^2-49  

 x2 +14x+49x^{2\ }+14x+49  

 x214x+49x^2-14x+49  

 x214x49x^2-14x-49  

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

A expressão  (x1)(x+1)\left(x-1\right)\left(x+1\right)  é equivalente:

 x21x^2-1  

 x2+1x^2+1  

 x22x+1x^2-2x+1  

 x2+2x+1x^2+2x+1  

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Qual dos seguintes polinómios é equivalente à expressão  (2y+5)(2y5)\left(2y+5\right)\left(2y-5\right) ?

4y2+254y^2+25

4y210y+254y^2-10y+25

4y2+10y+254y^2+10y+25

4y2254y^2-25

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 Aplicando os casos notáveis da multiplicação, a simplificação da expressão   (2x+6)2(-2x+6)^2  é:

 2x212x+62x^2-12x+6  

 4x2364x^2-36  

 4x212x+364x^2-12x+36  

 4x224x+364x^2-24x+36  

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Qual dos seguintes polinómios é igual a (x3)2x2\left(x-3\right)^2-x^2  :

-9

9

 6x9-6x-9  

 6x+9-6x+9  

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Qual das expressões representa  (12x)2\left(1-2x\right)^2  

 14x +2x2 1-4x\ +2x^2\   

 14x+2x21-4x+2x^2  

 14x + 4x21-4x\ +\ 4x^2  

 14x4x21-4x-4x^2