Question

Ajuda?
Equação 

(x+3)² = 1

Answer 1

(x + 3)² = 1
x² + 6x + 9 -1 = 0
x² + 6x + 8 = 0
delta---.> 36 - 32 = 4
Vdelta---> V4 = 2
x' = (-6+2)/2 = - 2
x"= (-6-2)/2 = - 4

Answer 2

$(x+3)^2=1\\x^2+6x+9=1\\x^2+6x+8=0\\ \\\Delta=6^2-4.1.8\\\Delta=36-32\\\Delta=4\\ \\x= \frac{-6\pm2}{2} \\ \\x'= \frac{-4}{2}\\x'=-2\\ \\x''= \frac{-8}{2} \\x''=-4$

$S=\{-2,-4\}$