ACT 2021 April(D05) Math Question 20 Explanation - ACT Helper

Pricing | Login

2021 April(D05) Math Question 20
Number Types & Properties
- Complex Number
Complex Number, Undefined fraction
Choice K
$a^{2} + 1 = 0$
$a^{2} = - 1$
$∴ a = \pm \sqrt{- 1} = i$
Skills you are tested for:
Was this explanation helpful?
Add your comment
Your mood
Thanks for your feedback! ❤️

Comments

To leave a comment,