Question

What is the solution of the equation x2 + 4 = 0?

x = ±i


x = ±2i


x = ±2

Answer 1

D

Explanation:

The question on Edge 2020:

What are the solutions to the equation x2 + 4x + 5 = 0?

A) x = −4 + 2i or x = −4 − 2i

B) x = 1 or x = 4

C) x = −2 + i or x = 2 − i

D) x = −2 + i or x = −2 − i

Answer 2

X x 2 + 4 = 0
2x + 4 = 0
2x = -4
Divide both sides by 2
————> X = -2 <————-