Výrazy - násobení závorky 2

Výrazy - násobení závorky 2

8th Grade

10 Qs

quiz-placeholder

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Výrazy - násobení závorky 2

Výrazy - násobení závorky 2

Assessment

Quiz

Mathematics

8th Grade

Practice Problem

Medium

Created by

Jan Kučera

Used 2+ times

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10 questions

Show all answers

1.

MULTIPLE SELECT QUESTION

45 sec • 1 pt


 5(2a+3b4c)=5\cdot\left(2a+3b-4c\right)=  

 10a+15b20c10a+15b-20c  

 10a+15b9c10a+15b-9c  

 7a+8bc7a+8b-c  

 10a+15b+20c10a+15b+20c  

2.

MULTIPLE SELECT QUESTION

45 sec • 1 pt


 (12x23y3+4z)2 =\left(12x^2-3y^3+4z\right)\cdot2\ =  

 24x46y6+4z224x^4-6y^6+4z^2  

 24x26y3+8z24x^2-6y^3+8z  

 14x25y3+6z14x^2-5y^3+6z  

 14x26y3+8z14x^2-6y^3+8z  

3.

MULTIPLE SELECT QUESTION

45 sec • 1 pt


 2a(3a22b+6)=2a\cdot\left(3a^2-2b+6\right)=  

 5a34ab+8a5a^3-4ab+8a  

 6a3a2b2+8a6a^3-a^2b^2+8a  

 6a34ab+12a6a^3-4ab+12a  

 5a3ab+8a5a^3-ab+8a  

4.

MULTIPLE SELECT QUESTION

45 sec • 1 pt


 (b3+c)8a=\left(b-3+c\right)\cdot8a=  

 8ba24a+8c8ba-24a+8c  

 8ab+5a+8ac8ab+5a+8ac  

 8ab5a+8ac8ab-5a+8ac  

 8ab24a+8ac8ab-24a+8ac  

5.

MULTIPLE SELECT QUESTION

45 sec • 1 pt


 a(2a+2b3c)=-a\cdot\left(2a+2b-3c\right)=  

 2a22ab+3ac-2a^2-2ab+3ac  

 2a2+2ab+3ac2a^2+2ab+3ac  

 2a2+2ab3c-2a^2+2ab-3c  

 2a22ab3ac-2a^2-2ab-3ac  

6.

MULTIPLE SELECT QUESTION

45 sec • 1 pt


 3(2a3b+4c5d)=3\cdot\left(2a-3b+4c-5d\right)=  

 5a+0b+7c2d5a+0b+7c-2d  

 6a9b+12c15d6a-9b+12c-15d  

 6a6b+12c2d6a-6b+12c-2d  

 5a+6b+12c15d5a+6b+12c-15d  

7.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

 (2x3y+4z5a)(2x)=\left(2x-3y+4z-5a\right)\cdot\left(-2x\right)=  

 4x2+5xy6xz+7ax-4x^2+5xy-6xz+7ax  

 4x2+6x8x+10x-4x^2+6x-8x+10x  

 4x2+6xy8xz+10ax-4x^2+6xy-8xz+10ax  

 4x6xy8xz+10ax-4x-6xy-8xz+10ax  

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