Question

Solve x2 + 4x + 8 = 0.

Answer 1

x² + 4x + 8 = 0
x = -(4) ± √((4)² - 4(1)(8))
                    2(1)
x = -4 ± √(16 - 32)
                 2
x = -4 ± √(-16)
             2
x = -2 ± 4i
          2
x = -1 ± 2i
x=  -1 + 2i    or    x = -1 - 2i