Question

Which of the following is a solution of x^2 + 4x = −8?

x = −2 − 2i
x = 2 + 2i
x = −4 + 4i
x = 4 − 4i

Answer 1

x²+4x+8=0
use the quadratic formula: (sorry cannot type it here)
√(b²-4ac)=√(4²-4*1*8)=√(16-32)=√(-16)=+/- 4i
x=(-4+4i)/2 or (-4-4i)/2
x=-2+2i or x=-2-2i
the answer is A