Complex Numbers Radical Signs

What are the zeros of the function f(x) = x² + 64?

• -8 and 8

• -8i and 8i

• (-√8) i and (√8) i

• -√8  and √8

Simplify 
√-25

• -5i

• 5

• 5i

• -5

Simplify:
√-108

• 3i√6

• 3i√20

• 6i√3

• 20i√3

The product of the following complex number in polar form √5(cos130^o + i sin130^o) ⋅ √45(cos15^o + i sin15^o) is...

• 50(cos145^o + i sin145^o)

• 15(cos145^o + i sin145^o)

• 81(cos100^o + i sin100^o)

• All Options are Correct

• 7

• -7

• 7i

• -7i

• 15i

• -15i

• No Solution

• 15

Simplify.

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• 
• 

Simplify.

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The distance between z=4-3i and w=-2-4i on the complex plane is...

• √35

• √35 i

• √37

• 5i

Let w=-√3/2 + 1/2 i calculate the modulus and argument.

• 3, 120^o

• 5, 270^o

• 1, 150^o

• Not Possible