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Find Imaginary Roots

Authored by Anthony Clark

Mathematics

11th Grade

CCSS covered

Find Imaginary Roots
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11 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

If the discriminant is negative, then the quadratic has:

Real Solution

Real Solutions

Half a Solution

No Real Solutions

Tags

CCSS.HSA-REI.B.4B

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Are the roots of the function f(x)=3x2+3x+3 real or imaginary? (hint: graph it)

Real Roots

Imaginary Roots

Impossible to tell

Both

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following would be a root with 3i?

3i2

-3i

3i

-3i2

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following would be the correct factored form with roots 2, 5i, and 6?

(x-6)(x-2)(x+5i)(x-5i)

(x+6)(x+2)(x+5i)

(x-6)(x-2)(x-5i)

(x+6)(x+2)(x-5i)

Tags

CCSS.HSA.APR.B.3

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

If a+bi is a root of a polynomial, then _______ is also a root.

i2

a-bi

a+bi

-i2

Tags

CCSS.HSN.CN.C.9

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Use the Complex Conjugate Root Theorem to state another complex solution. Given that -2-5i is a root. 

-2-5i

-2+5i

2+5i

5i

Tags

CCSS.HSN.CN.A.3

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Use the Complex Conjugate Root Theorem to state another complex solution. Given that -7i is a root. 

7i

-7i+1

1-7i

1+7i

Tags

CCSS.HSN.CN.A.3

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