Question

X ao quadrado + 8 x + 16= 0

Answer 1

x² + 8x + 16 = 0
a = 1; b = 8; c = 16

Δ = b²  -4ac
Δ = 8² - 4.1.16
Δ = 64 - 64
Δ = 0

x = - b +/- √Δ    = - 8 +/- √0
      --------------     -----------------
            2a                  2.1

x = - 8 /2
x = - 4

R.: x = - 4