Question

y=× ao quadrado +8×+16

Answer 1

Y = X² + 8X + 16

X² + 8X + 16
Δ = 8² - 4 . 1 . 16 
Δ = 64 - 64
Δ = 0 

X = -8 +- √0
      -----------
          2.1
X = -8 +- 0 
    -----------
         2

X' = -4
X'' = -4

Y = {-4,-4}