Question

May someone please help me with this question

Answer 1

Answer:

2+i or 2-i (D)

Step-by-step explanation:

First you use the quadratic formula.  X= (-b +/- $\sqrt{b^{2}-4ac }$)/2a

a=1

b=-4

c=5

X= (4 +/- $\sqrt{16-20}$)/2

X=(4 +/- $\sqrt{-4}$)/2

The square root of -4 is 2i.  i=√-1.  Therefore 2i= 2√-1 .If you simplify that, it becomes  √-4i.  

X= (4+/- 2i)/2

X= 2+/-i

X= 2+i or 2-i