Question

Give exact and approximate solutions to three decimal places.
x^2 +8x +16=1
What are the exact solutions?
x=

Answer 1

x=-5 , x= -3

Answer 2

\[x ^{2}+8x+16-1=0\]\[x ^{2}-8x+15=0\](x-5)(x-3)=0
x=5.000
x=3.000

Answer 3

To three decimal places or
x=3 and x=5 exactly.

Answer 4

so I'm a little confused is it plus or minus?