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

x = ± 2i

Step-by-step explanation:

x² + 4 = 0 has no real solutions but has 2 complex solutions

Note that = i

Given

x² + 4 = 0 ( subtract 4 from both sides )

x² = - 4 ( take the square root of both sides )

x = ±

  = ±

  = ± ×

  = ± 2i

Thus the solutions are x = - 2i or x = 2i