Question 43 Answer and Explanation _ACT April 2022 Form Z08 Math Section

Question 43 Answer and Explanation _ACT April 2022 Form Z08 Math Section

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43. Given the complex numbers 2 - i and 2 + i, which of the following expressions is equal to $\sqrt{(2-i)(2+i)}$ ?

A. $\sqrt{3+4i}$

B. $\sqrt{5-4i}$

C. $\sqrt{5+4i}$

D. $\sqrt{3}$

E. $\sqrt{5}$

Answer and Explanation

Your Answer is

Correct Answer is E

Explanation