Question

What are the solutions of x^2-4x+5=0

A. x=2+i/3 or x=2-i/3
B. x=1+i/2 or x=1-i/2
C. x=3+i or x=3-i
D. x=2+i or 2-i

Answer 1

Should be D.

Explanation:

Because you can't factor the equation you use the quadratic formula. By using it you should get 4 plus or minus the square root of -4 all over 2. Simplified would be 2 plus or minus i