Question

x ao quadrado + 8× + 16

Answer 1

x²+8x+16 = 0
faça por báscara:
Δ = b² - 4.a.c
Δ = 8² - 4.1.16
Δ = 64 - 64
Δ = 0

X1 = -b +ou-√Δ / 2.a

X1 = -8 +√0 / 2.1
X1 = -8/2
X1 = -4

X2 = -8 -√0 / 2.1
X2 = -8/2
X2 = -4