Write the Complex Conjugate of the Following Complex Number and Then

question 118

Multiple Choice

Write the complex conjugate of the following complex number and then multiply the number by the complex conjugate. Write the result in standard form.
$$1 + \sqrt { - 20 }$$

• A) \(1 - 20 i ; 19\)
• B) \(1 - 5 \sqrt { 2 } i ; 21\)
• C) \(- 1 - 2 \sqrt { 5 } i ; 21\)
• D) \(- 1 - 2 \sqrt { 5 } i ; 19\)
• E) \(1 - 2 \sqrt { 5 } i ; 21\)

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Definitions:

Cnidarians

A phylum of aquatic invertebrates known for their distinctive body structure featuring a jelly-like substance called mesoglea, and their tentacles equipped with cnidocytes for prey capture and defense.

Flatworms

A phylum of simplistic, soft-bodied invertebrate animals known for their flattened shape, including both free-living species like planarians and parasitic species.

Mollusks

A diverse group of invertebrates including snails, octopuses, and clams, known for their soft bodies, some with hard shells.

Annelids

A phylum of worm-like animals characterized by segmented bodies and the presence of a true coelom, including earthworms and leeches.