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Solving Cubic Equations

Authored by Chazz Schmitt

Mathematics

9th - 12th Grade

CCSS covered

Used 8+ times

Solving Cubic Equations
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10 questions

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1.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

 Solve      x3125=0Solve\ \ \ \ \ \ x^3-125=0  

  5 , 5+5i325\ ,\ \frac{-5+-5i\sqrt{3}}{2}  

 5, 5+3525,\ \frac{-5+-3\sqrt{5}}{2}  

 5, 5+5325,\ \frac{-5+-5\sqrt{3}}{2}  

 5, 5+3i525,\ \frac{-5+-3i\sqrt{5}}{2}  

2.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

 Solve       x327Solve\ \ \ \ \ \ \ x^3-27  

 3, 3+3i223,\ \frac{-3+-3i\sqrt{2}}{2}  

 3, 3+3i323,\ \frac{-3+-3i\sqrt{3}}{2}  

 3, 3+3323,\ \frac{-3+-3\sqrt{3}}{2}  

 3, 3+3223,\ \frac{-3+-3\sqrt{2}}{2}  

Tags

CCSS.8.EE.A.2

3.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

 x3+x2+5x+5=0x^3+x^2+5x+5=0  

 1, 5i, 5i-1,\ 5i,\ -5i  

 1, i5, i5-1,\ i\sqrt{5},\ -i\sqrt{5}  

1, 5i, -5i

 1, i5, i51,\ i\sqrt{5},\ -i\sqrt{5}  

4.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

 x34x2+x4=0x^3-4x^2+x-4=0  

4, 2i, -2i

1, 4i, -4i

4, i, -i

2, 2i, -2i

5.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

 x32x2+3x6=0x^3-2x^2+3x-6=0  

 2, i3, i3-2,\ i\sqrt{3},\ -i\sqrt{3}  

 2, 3i, 3i-2,\ 3i,\ -3i  

 2, 3i, 3i2,\ 3i,\ -3i  

 2, i3, i32,\ i\sqrt{3},\ -i\sqrt{3}  

6.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

 x34x25x=0x^3-4x^2-5x=0  

0, 1, -5

0,-1, 5

1, -5

-1, 5

Tags

CCSS.HSA-REI.B.4B

7.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

 x36x2+5x=0x^3-6x^2+5x=0  

1, 5

-1, -5

0, -1, -5

0, 1, 5

Tags

CCSS.HSF-IF.C.7C

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