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Examen 2o (1° Octubre 2020)

Authored by Gabriel Porras

Mathematics

8th Grade

CCSS covered

Used 3+ times

Examen 2o (1° Octubre 2020)
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5 questions

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1.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Suma los siguientes términos: 3x24x+4;4x2+5x73x^2-4x+4;-4x^2+5x-7  


 x+x23-x+x^2-3  

 x2+9x3-x^2+9x-3  

 x2+x3-x^2+x-3  

 x2+x3x^2+x-3  

2.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Resta los siguientes polinomios:

 (17a+43b)(27a+13)(37a23b)=\left(\frac{1}{7}a+\frac{4}{3}b\right)-\left(\frac{2}{7}a+\frac{1}{3}\right)-\left(-\frac{3}{7}a-\frac{2}{3}b\right)=  



 27a+76b13\frac{2}{7}a+\frac{7}{6}b-\frac{1}{3}  

 67a+2b13\frac{6}{7}a+2b-\frac{1}{3}  

 27a+2b+13\frac{2}{7}a+2b+\frac{1}{3}  

 27a+2b13\frac{2}{7}a+2b-\frac{1}{3}  

3.

MULTIPLE SELECT QUESTION

3 mins • 1 pt

 (4x212xy+9y2)(25x2+4xy32y2)(4x^2–12xy+9y^2)-(25x^2+4xy–32y^2)  

 21x216xy+41y2-21x^2-16xy+41y^2  

 21x216xy+40y2-21x^2-16xy+40y^2  

 21x218xy+41y2-21x^2-18xy+41y^2  

 22x216xy+41y2-22x^2-16xy+41y^2  

Tags

CCSS.HSA.APR.A.1

4.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Tomando en cuenta los Valores de A, B, C resuelve la operación: 2A+B-2C

 A=3xyx2+y21A=3xy-x^2+y^2-1  

 B=7x2+3xy+4B=7x^2+3xy+4  


 C=3y2x2+4xyC=3y^2-x^2+4xy 

 7x24y2xy6-7x^2-4y^2-xy-6  

 7x24y2+xy+27x^2-4y^2+xy+2  

 11x2+8y217xy211x^2+8y^2-17xy-2  

 x24y2xy+2-x^2-4y^2-xy+2  

5.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Desarrolla la siguiente operación:

 (32a2b+34ab2b3)+(18a2b56ab2+23b3)\left(-\frac{3}{2}a^2b+\frac{3}{4}ab^2-b^3\right)+\left(\frac{1}{8}a^2b-\frac{5}{6}ab^2+\frac{2}{3}b^3\right)  

 (12a313b3)-\left(\frac{1}{2}a^3-\frac{1}{3}b^3\right)  

 12a3118a2b112ab2-\frac{1}{2}a^3-\frac{11}{8}a^2b-\frac{1}{12}ab^2  

 12a3+118a2b112ab2+b3\frac{1}{2}a^3+\frac{11}{8}a^2b-\frac{1}{12}ab^2+b^3  

 32a358a2b+1312ab2-\frac{3}{2}a^3-\frac{5}{8}a^2b+\frac{13}{12}ab^2  

 12a318a2b12ab22b3-\frac{1}{2}a^3-\frac{1}{8}a^2b-\frac{1}{2}ab^2-2b^3  

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