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TAREA 1 - LUNES 22 DE JUNIO

Authored by Amalia Samaniego

Mathematics

8th Grade

Used 9+ times

TAREA 1 - LUNES 22 DE JUNIO
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8 questions

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1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

  (9x3 + 5x2 y5)2 =\left(9x^3\ +\ 5x^2\ y^5\right)^2\ =  

 81x9 + 90x6y5 + 25x4y781x^9\ +\ 90x^6y^5\ +\ 25x^4y^7  

 81x6 + 90 x5y5 + 25x4y1081x^6\ +\ 90\ x^5y^5\ +\ 25x^4y^{10}  

 81x6 + 45x6y5 + 25 x4y1081x^6\ +\ 45x^6y^5\ +\ 25\ x^4y^{10}  

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 (6 xm+1  7)2 =\left(6\ x^{m+1}\ -\ 7\right)^2\ =  

 36 x2m +2 84 xm+1 +4936\ x^{2m\ +2}\ -84\ x^{m+1}\ +49  

 36 xm+2 84 xm+1 +4936\ x^{m+2}\ -84\ x^{m+1}\ +49  

 36 x2m+1 84 xm+1 +4936\ x^{2m+1}\ -84\ x^{m+1}\ +49  

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 (2b 5)(2b +5)=\left(2b\ -5\right)\left(2b\ +5\right)=  

 4b 254b\ -25  

 4b2 254b^2\ -25  

 4b2 104b^2\ -10  

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 (25x3 + 1)(25x3  1)=\left(\frac{2}{5}x^3\ +\ 1\right)\left(\frac{2}{5}x^3\ -\ 1\right)=  

 425x6  1\frac{4}{25}x^6\ -\ 1  

 410x5  1\frac{4}{10}x^5\ -\ 1  

 425x9  1\frac{4}{25}x^9\ -\ 1  

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 (x12 +9)(x12  6)=\left(x^{12}\ +9\right)\left(x^{12}\ -\ 6\right)=  

 x24 54x^{24}\ -54  

 x24 +3x12 54x^{24}\ +3x^{12}\ -54  

 x24 3x12 54x^{24}\ -3x^{12}\ -54  

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 (3x 2)(3x5)=\left(3x\ -2\right)\left(3x-5\right)=  

 9x2 21x +109x^2\ -21x\ +10  

 9x27x 109x^2-7x\ -10  

 9x210x + 109x^2-10x\ +\ 10  

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 (x + 2)3=\left(x\ +\ 2\right)^3=  

 x3+6x2+4x +8x^3+6x^2+4x\ +8  

 x3+6x2+12x +8x^3+6x^2+12x\ +8  

 x3 +6x2+12x + 4x^3\ +6x^2+12x\ +\ 4  

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