hi i got this question :

give the equation of the normal line to the graph of y=2x SQRT(x^2+8) + 2.

at the point (0,2)

what are they asking me? what is the equation of the normal line? I was like, are they asking me for mx+b form of this or something? because none of the answers have a form like that.

the answers are :

a) x-4 sqrt(2) y = -8 sqrt(2)

b) x+4 sqrt(2) y = 8 sqrt(2)

c)4 sqrt(2)x + y = 2

d)-4 sqrt(2)x + y = 2

e) x+4 sqrt(2)y = 2

PS how do I write math with html so it looks readable like you pro posters do?