solve the equation by completing the square. round to the nearest tenth. x^2+8x=10

Question

A. 1.1, 9.1
B. 1.1, -9.1
C. -1.1, 9.1
D. -1.1,-9.1

my answer is A is that correct

Answer 1

x^2 + 8x + 16 = 10+16
(x+4)^2 = 26
x+4 = ±√26
x = -4 ±√26

Nope, not A

Answer 2

4,2

Answer 3

I dont get it